frustrating severe low hook

[Naz 089]

I am 14 years old and have been playing a lot of golf lately but really badly. 75% of the time I have done as very low and severe hook with all my clubs. On the rare occassion where I have hit it straight it has been with a good tradjectory. My handicap is 26 whihc is pathetic but if I can fix this problem I think I can bring it down to about 18. How can I fix this as Golf is becoming less enjoyable because of the problems.
Thanks