Yeah I still struggle to dribble as well. I'm not sure if I should be using L1, L2 or L2+R2.
L1 is precision dribbling. L2 is shield the ball. L2+R2 is face up dribbling (I think that's its name!).
I use L2 occassionally and L2+R2 a bit but it's contextual. You'd be better off learning some basic skill moves probably.
Fake shot, Ronaldo chop and heel to heel are good places to start.
Ronaldo chop is 4*, heel to heel is 3* but the 4* version of it is OP.

