well, when you read (mā), the tip of your tongue rolls down slightly, and your lips pop from closed to open.
and: ○ It's a rolling tongue sound. When you pronounce it, the tip of your tongue should be tilted to the top of your palate, and then it should be developed. And sound.
Ba: (bēi) is followed by a consonant D, which is omitted in both Chinese and Tibetan. It can be read as bēidemēi, and de is light and short, passing by.
mi: mēi can be written in other ways, such as [mouth+mi] and [mouth+fan]. It should be pronounced as mēi, but not as mī, which is derived from the positional lattice of Sanskrit words.
bang: pronounced as (hōng bang), and some books have phonetic notation as (hòng). You can pronounce it once or four times, and you can decide it by yourself according to the scene and wishes. Most of them read four times.