Why don't you leave the game alone for the time being and just take some very easy instruction from a book/internet.
From everything I have seen of RS, you really do not want to be a novice starting from scratch on it, like yourself.
What is your fav song or songs, learn to play one of those first. I'm a Dylan nut so for me it was Dylan tunes, luckily enough,a lot of them are just G,Am,D so not too hard.
I'm shat at guitar, but can play a few things. On the vids I have seen the interface still looks alien to me. I can read a very small amount of a musical score, some tab, but mainly chords. If you put the time in the rewards come very quickly, stick with it.
"Duffman is thrusting in the direction of the problem! Oh, yeah!"