Like you when I started I did mostly 1 table SNG's because they were easy, switched to ring and got my ass handed to me.

Full ring is much more long term and about reading your table and your opponents. If you want to get better at ring, download some software to be able to analyze hands and see what your opponents are doing while you are playing against them. It also helps to take notes with starting hands so that when you are involved in the post flop play (like Gator says, this is most important at ring) you have a better sense of what people will limp, raise and reraise with preflop to narrow ranges.

Then, after each session take a look at key hands and figure out what you did or didn't do. It helps.

You might also want to drop down a couple of levels so that you don't have to worry about your bankroll at all while you learn the fundamentals.

Just my .02, I'm still learning as are a lot of us here. Currently I'm working on turn and river play.