Moving to NL - what should I know?

[RoundTower]

I mostly play mid limit PLO. I've played about 20,000 hands of NLH and PLH in my life, mostly live, at pretty much all stakes. I was a moderate winner playing live. Now I want to start playing online.

I don't think I'm beating the NL$400 on iPoker. Small sample, but I think I'm doing some things wrong. It seems there are several bad players but I am not taking enough advantage of them, or maybe playing too many hands with the stronger regs.

(edit) I play a mix of 9 and 6 handed PLO. When I've played live NL it's mostly 8-10 handed. I expect to be playing mostly 6 max online.

What adjustments should I be making?