Hi emmalou
There is loads that you can fill up on for free - it can be hard to get your head round at first.
Cant add much to what others have said. Just wanted to say hi and welcome.
It's well worth reading your books as they do explain it all quite well and they're good to refer back to every now and again it keep you on track.
I'm in my second week. Joined a couple of weds ago.
Good luck