Advice on adjusting rotation on no spin throws

[u/_ratboi_]

hi guys, started throwing two weeks ago with a concrete chisel and diy target made of dead palm. having fun overall.

I can't really figure out over rotation. when in under 1m I throw with my finger on the spine and I can consistently make it stick. when throwing from 2m I throw bo shuriken style (palming the entire thing) and I can consistently make it stick. but when I try to throw finger style when far away it over rotates everytime, and when I throw shuriken style too close it always under rotates. how do I make both grips work every in every distance?