Welcome to this Myanmar itinerary :)
First of all some information about me. I backpacked Myanmar in the year of 2017 together with a friend, both 18yo. females (which btw was never an issue). It was a super tight budget trip and for a little more than 3 weeks we spent around 600 Euros there including the Flight to Bangkok to get there. We took our time and enjoyed just walking around and taking in the vibes and the culture, at this point we have been backpacking SEA for 2 months already with a lot more to come. So if you want to experience more different destinations while there i will give some suggestions in the end.
I mostly wont be commenting on accomondation, but basically we just stayed in the cheapest hotels available. For transport we just used the local long howl bus system unless anything else is mentioned. (Very easy to use, you can buy tickets at hotels, bus station, or offices everywhere.)
Next some general information about travelling Myanmar:
Keep in mind that even if you have been to other SEA (southeast-asian) countries, Myanmar will feel very different. Since it has not had opened borders until "recently", it is not too much influenced by globalisation. The country changes rapidly, and things i experienced in 2017 might be a little outdated by now. Also entering the country by bus was very hard in 2017, flights very cheap on the other hand.
Foreigners are pretty rare in Myanmar, so you will probaply asked for pictures and you will be stared at a lot. Kids will wave at you and random people on motor bikes will express their greetings. The locals are increadibly friendly and do everything to help you, dont expect them to speak english though. Also especially to the girls out there: dont wear any revealing clothing. (I only made the mistakes of going out with shorts once after getting used to it in Thailand) Make sure to bring wide long and thin trousers.
At least in 2017, although apparently always improving, getting cash from ATM`s wasnt something that could be taken for granted. There were only very few ATM's around, so we always withdrew a lot of money, since everything is paid in cash.
Personally, I absolutely loved the food in Myanmar. Currys, tea leaf salad and a lot of exotic and cheap street food. Most of the people I met did experience a food poisoning at least once though. I apparently was lucky, but i reccomend reading articles on how to spot good street food in SEA before going.
Sooo.... lets get into the actual itinery:
...is a very interesting city. It isnt like anything else in this country and the quite modern city center is a great contrast to the more traditional parts. We stayed here for 3 days and were lucky enough to spend time here when the end of the rainy season was celebrated, the Tazaungdaing Festival, (same time as the poular light festival in Chiang Mai, Thailand). We found ourselves some local friends and spend most of the time wandering around, enjoying the city:
Shwedagon Pagoda: Is definetly the most famous sight and a very impressive Pagoda (you will see a lot more). Make sure to bring fitting clothing to enter the Temple, otherwise you need to borrow some there.
Kandawgyi Lake: Is a very nice park for a walk and also a place where a lot of local people relax.
Scots Market: Is honestly only interesting to see if you have a lot of time or havent been around SEA before.
If you dont have 3 weeks, i would reccomend spending a little less time in Yangon.
For continuing your trip, buy a bus ticket to Inle Lake. If you have extra time you can go to a nearby palce and hike there, although i personally recommend doing the hiking in the north (we will come to that later). Make sure to plan plenty extra time for getting onto your bus because the bus terminal is huge and very confusing.