Hello
I have only been playing since christmas, so this is all new to me.
i have learnt quite a few riffs on my brand new acoustic guitar

, such as walk this way, the chain, woohoo(killbill), wipeout, all along the watchtower, etc.
anyway, i am usually a keyboard player, but now ive mastered that im choosing to play the guitar. It is really hurting my left wrist!!!
but i have a problem

i seem to want to use my thumb for all the strings instead of using my other fingers for the g, b & e. can anyone please give me advise on how to do that, because when learning the house on the rising sun.....its hard!!!
thanks alot,
brett