After a little advice please?

I'm a loosing player unfortunately, finally admitting it. 5NL seems easy, 10NL i feel like I'm winning however the results don't lie.
I feel like i change my strategy too often to completely tell.

I'm going to study more, but I can't tell what game to play. Should I try to crush 5NL zoom or 10NL reg tables or struggle at 10NL zoom to improve. Stats below, PP & Stars. Since I got this laptop c6months and last 6weeks.

PS All time

PP All Time

PS last 6 weeks

PP last 6 weeks

Questions are:
What stakes should I be playing at to learn?
Is it possible to beat the rake at 10NL - the regs i have '000s of hands on are losing?

any adivce is appreciated!