If I had it to do all over again - I would NOT jump all over place getting info from here and there and trying to sort it out. Here's why...
#1 - There are several different styles and approaches and you don't know enough to tell the difference.
#2 - These different styles and approaches are all exteremely valid as they are directed to different phases or positions of the game and you don't know enough to tell the difference. A couple very common misconceptions are how and when to play suited connectors and how and when to limp (it not totally forbidden).
#3 - What you are reading or looking at is usually tournament or cash specific. Are you far enough along to keep track of which is which? Nothing a cash player loves much better than sitting down in a ring game with tournament player and visa
versa. Can you distinguish the difference?
I am still finding out from stuff I learned the first year - "Oh that just applies to limit games..." "So that's a tournament strategy?" "Oh that's for short-handed ring games!"
So first thing is determine if you are going to focus on tournament or cash. Most newbies gravitate to tourney and it probably is more fun to start. Second commit to a "teacher". In other words - get some continuity by learning from one source. I would recommend (and many others in here would too) getting the Phil Gordon books and go through those first. They are available in sets and as already was mentioned - the Green book is the core of his teaching. Now Gordon does not get super specific so once you have his concepts down move on to some more detail with something like the Harrington on Hold'em trio of books.
These will give you a super solid foundation to exapnd from - and don't kid yourself - you will need to expand. You will want to learn how to effectively play short handed, heads up, pot control, etc. There are lots of new materials that have come out and will be many more by the time you are ready.
And if you are playing online you are at a severe disadvantage if you are not using PT3 or HEM.
"i assume the majority of online players are playing so efficiently and only the highest probability scenarios how is there any room to win over the long run?"
Because your assumption is not entirely correct. I mean you would think so but when it comes down to it it is still a guessing game with incomplete information. Keep your eyes open and you will see players making bad decisions and you will know this is a guy you can probably exploit. Great thing about this game is the control you have in deciding who you want to play against/get in a hand with. And there will be those times you don't find that guy at your table - that's when you pack up and find another place to play.