i want to be really good at the piano..i wanna learn more songs
if you want to really be good at piano you need to get a teacher. I realize the poster above me mentioned getting a teacher, I am emphasizing that point.
I would like to add though, unless you do it out of the kindness of your heart (and why you would do that i don't know), the only reason to put lessons online is to make money – the person putting the lessons up has no intention of teaching you anything. a physical teacher at least would care how you are progressing and assist you.
there may possibly be an exception with the video-video lessons though… but it still seems….blah