[HeavensDevil]

I think you should start from like the smallest NL cash games and try out different hands and ways to play them against certain opponents. You try to figure out what type of hands your opponent is likely to have and how he is going to play them.
For example in the really smallest games people play all sorts of hands and usually weirdly. Those games are great for figuring out which hands are solid and which are just crap. And should build you some confidence to bet hard, what you typically want to be doing.
Try out different things. Think why they worked or didn't work and in what kinds of situations those plays might work better. Also you should think about your opponents' plays: why were they bad/good and how could you use that to your adventage.

One fun drill to try out is to limp (just call) every hand pre-flop and start the play from the flop. That puts you in very tough marginal decisions on later streets which is a very good way to learn post-flop play.