If you're not used to hot humid weather skip the summer. You can use government operated taxis, Uber or careem. Metro and buses are available and efficient. As far as hotels you would probably need to decide "which area you would like to stay in first and then someone could give you advice on which hotel in that area is more elite friendly. I'm not sure which Hyatt is more elite friendly, but I like the Hyatt regency in diera because of the lounge access (breakfast, afternoon snacks tea, and dinner buffet with unlimited drinks), and lounge service and housekeeping are excellent in providing what you need (even though I never get daily housekeeping due to covid) and the price is reasonable I stay there long term so they upgrade to certain rooms not suites on long stays and I've been upgraded to suites on short stays. But to be honest I like the regular rooms for some reason. Maybe because the suite felt like an obstacle course (to me).If you've never been to Dubai and don't want to stay in old town, which is the only area I like ad rest of Dubai is skyscrapers more or less and beach areas which are tourists magnets. So, I stay away from those areas. If you decide to go in the summer, don't make the same mistake many other tourists make and wear tshirts, shorts and flipflops. You actually should wear a hat, clothing you would wear for something like fly fishing or hiking...nylon/polyester wicking clothing...long sleeves and long pants to keep the sun off your skin to stay cooler and not sunburned. Just some tips to help keep you cooler. Good luck.

You'll need cash to tip hotel staff, pay at small vendors etc. Entry into Dubai only needs covid tests if you're not vaccinated. You need to have medical insurance also.

Look on the IATA website for current updates.