Quick question how long would it take for a beginner(me) to atleast play at a certain riffs. I'd love to be able to play wonderful tonight-eric clapton.
Depends on how much of a goon you are. But it is probably easier than you think.
Also whats better to practice on an electric with a pick or acoustic with fingers.
It is a trade off between how likely you are to be discouraged and how easy it is to play. If you can handle it, the best thing to do is make it hard for yourself and play without a pick, on a really crap acoustic guitar. I hardly ever use picks because I could never find one when I started. Occasionally I will use an oyster card.