Simon if you want something really badly, you have to try to succeed no matter what. Don't let your dad discourage you and put your down. Believe in yourself. If you like music then go for it. Try your best to make your dream come true. If you don't think you've got a good enough voice then in that case take lessons even though they can be quite expensive or go to a near by local club who have singing teachers and ask them if they can help you out. Second option try to find someone that you can form a group with and who could sing with you. Try and find options and don't let anyone put you down. Try to prove to your dad that he is wrong and that you can do a thousand times better than what he thinks. I'm sorry that you have to live in such an atmosphere with your dad drinking and shouting. I can understand how bad you must be feeling right now. I think you can do it Simon. Just believe in yourself.