I just returned from a trip throughout Asia and spent 8 days in Myanmar in May. We flew from KUL into Yangon and took the standard route on to Bagan, Inle Lake, and Mandalay, where we flew out to Bangkok. Myanmar was an incredibly unique destination and one of my favorite places I've visited in Asia.

I didn't use a travel agent for anything. All accommodations were booked through agoda.com (usually the night before, costing $20-$30 for twin room with ensuite bathroom encluding breakfast). Traveled between cities using buses booked the night before or day of (just booked through the front desk at our accommodation). I'd highly recommend paying extra for the VIP buses - they're much more comfortable than the standard buses and usually only $1-$3 more.

For transport within cities, finding a taxi on the street is fine. Most are fair, although if a taxi hanging outside of your accommodation quotes a price that seems high, don't be afraid to walk a block or two and you could save significantly. With the exception of drivers that swarm you at vulnerable places (immediately upon exiting a bus, right outside your hotel, etc.), most were honest and quotes fair prices.

I'd say renting e-bikes in Bagan is a must. They can be a bit intimidating at first, but you'll get over that in 5 minutes of riding. It was a ton of fun and an incredible experience exploring the temples on our own! This cost about $5 /day through our hotel.

I used ATMs the entire time and everything was fine. I did carry $200 since I had been warned there might be issues with ATMs, but had none.

Traveling in Myanmar is pretty straightforward on the main tourist trail and you would be fine even with minimal planning. You'll have a great time!