We stayed at the Le Meridian. It was nice. Cheap on points but that was before variable pricing. Plus easy access to the public transport. Easy to/from airport by train.
Great suggestions here. Agree with all. I like Augustine Keller even in winter, less crowded. https://www.augustinerkeller.de/en. Also the Viktual market is a must even in winter. I remember seeing a guy eating a brat and drinking a beer outside at 9 in the morning.
BMW is accessible by public transport, but you must make reservations.
While I have not been, the oldest brewery in the world is just outside of Munich and reachable by public transport. https://www.weihenstephaner.de/en/

Oh and my daughter said the pretzels in the Munich train station were the best she’s ever had.

I was just in Munich. In fact I'm on UA now, MUC-IAD. Hopefully by February things will improve, but train travel has been less efficient than usual. I've experienced various train cancellations and delays that didn't exist in my previous travels. The regional trains are quite busy, as there is this 9-euro card now, a bargain, which may well not exist by February.

However, I had no issues with airports or airplanes in Vienna, Hamburg, or Munich. This morning, it was about 15 min to clear security and passport control - in fast track but the regular security point was not busy either.

I'm going to seek a Bonvoy property near the main train station in Munich.

What is the route I should look for at MUC after I leave arrivals? Take U or S bahn?

If either are available, it doesn't matter.
S-Bahn is suburban train system which only goes below ground in the city center. U-Bahn is underground subway train system which covers the city center.
From the airport, you take either the S1 or S8 directly to the central train station.
If you are there for multiple days, (and assuming no 9 euro monthly pass available at that time), you can get a multiple day pass that includes that trip. There are machines, but can be confusing for that option. There is a desk where you can buy those tickets from a real live person near the S bahn departure.

A decent explanation is here: https://europeforvisitors.com/munich...ahn-s-bahn.htm

And the fare options explained here: https://www.mvv-muenchen.de/en/ticke...ets/index.html

Subway station "Olympiazentrum" is right in front of it. Very easy and quick to reach from downtown. See more here https://www.bmw-welt.com/en.html

Public transportation in Munich is very easy to use and should be your choice number one. Forget Uber in Germany. A regular taxi is much better if you insist to go by car.

I booked the Aloft Munich for three nights. It looks like it's right near the main station and close to everything. Good choice? Kebabs? lol

It is central and you have very good access to public transportation. The area is not the most beautiful area of Munich but that is no problem. Only drawback the whole area around the main station is currently and for the next years a big construction site.

S1 or S8 straight to M�nchen Hbf

The BMW museum is very easy to get to by the subway. You have to make one change traveling from the main station but it is to an adjacent platform. When I tried in May it was difficult to get a place on a plant tour. When I emailed them they replied to call back by phone the week before the visit. When I did that they said they didn’t have the schedule for tours for next week yet and check back in several days. When I did that they still didn’t have a schedule so call back next week. When I did that, there were no spaces left. I enjoyed the museum.
You can wander around the Olympic Park also, it is very close to BMW. I think they were just restarting tours after Covid so perhaps now they have it better worked out. There are two different places, the museum is on one side of the road, the showroom is on the other side. The showroom is free and it is huge. Don’t miss that.

mrs pbiflyer stayed there pre covid, no issues. Inside a fairly typical Aloft.
A couple ideas:
While it isn't really exciting during winter, you are a short walk to the Oktoberfest grounds, so you can at least say you've seen it and the famed Oktoberfest Kotzh�gel. (Use google translate)
A decent 10 cent walking tour - Hang a right out of your hotel, continue through the Kalstor medieval gates down the pedestrian street Neuhauser Strasse. It takes you past shops restaurants and sites to the Marienplatz town center, town hall and St Peter's church. If there is a stand selling gluhwein, stop and get some for the walk. You can also continue down the road to the famed Hofbrauhaus. From there you have two paths you can go down (with apologies to Led Zeppelin).
Continue past the Hofbrauhaus to the Muchin Residenz palace, gardens, and historic Odeonsplatz, then on to the above mentioned English Gardens (where brave folks might still be surfing).
Or from the back of St Peters, you can go to the Viktual Market, then on to the Deutsches museum. Plan on spending some time in the Deutsches museum, it is quite an interesting technical museum. You can continue on to the Maximilian Gardens. I liked strolling along the river, but may not be your cup of tea.

There are plenty in this area.

Uber is not allowed to operate in Germany, instead they broker limo services: Uber in Germany

More about aloft Munich is here: Aloft Munich, Germany [Master Thread]

More on what to do in M:
What to do in and around MUC
What to do in Munich?
Five days in/around Munich

That could have been me, although I prefer to go to Schneider Bauhaus for weisswurst, pretzel, and beer around 10:00am. It's on Tal just around the corner from the Viktualienmarkt.

If you were sitting outside, it might have been. I admit I was lazy typing in brat, it was another type of sausage and upon further reflection, the odds of me strolling by at 10 were significantly better than the 9 I claimed.
Whoever it was, they had my admiration, so hopefully it was you!