Welcome to the forum bud. To be honest, advice on technique on a forum isn't going to help you much. It's best if you can get an established shooter to have a look at your position and give you some pointers. After that it's just practice, but it does help alot if you get some 1 to 1 coaching first so you know what changes to your technique that you need to practice.
Have a word with Berty (Mark Bassett) and see if he can give you some standing tips, he helped me out a fair bit with mine.