Idk what a mono is but if u mean mannual just lean back pull up slightly on the front wheel and kick with ur legs to maintain balance
u can also lean back or forwards more or less to keep balance
when u go down steeper slopes with it ur going to have to lean forward a bit more otherwise u die
wheely on a bmx is just like a normal bike except on a higher gear this takes a bit of pratice and isnt as cool as a mannual
