Welcome to FTR!!

You've gotten some great advice above. Let me mention that I'm RARELY playing any ace worse than AT except in the CO / BTN, and I generally only add A9 in CO. This obviously changes in late game SnG/MTT situations where it's shove/fold time. Same for sc's - they are "sometimes play" hands from every position, and you can win just fine without them for now.

Check out the digests. The Beginner's Digest is great general purpose strategy, and each specific forum (SnG, MTT, Short Handed, Full Ring) has more specific articles collected in a digest stickied at the top.