full ring

[euri10]

I suck in a full ring game while when it's HU to 4-handed I'm quite a nice winner
I can't figure out why I cannot make adjustments for a 6 handed game....any hints ?
for instance, I often open raise in LP with 235. It's 4 handed, everybody draws 2, I brick.
1st question do you bet if checked to you ?
2nd do you call if bet into you ?
Imagine everybody checks, 3 people behind you draw 1, you draw 2 and have a 6.
do you call a bet ? a bet and a raise ?
I suspect my leak is not to fold in early round when I'm either drawing dead or when it's too costly to draw...