I know this question in now rather old, but I felt I had to respond since I'm new to hubbing.
I think many of the responses are spot on, you need to just begin. Become a member of the local library and read everything you can. Talk to other people, if you can't do it in person because declaring yourself a witch can be difficult at first, do it online. We are all willing to help - that is part of being a witch.
Pay attention to the environment, honour the passing of the seasons and take responsibility for your actions and choices. Being a witch isn't hard but being a good one is. It means always being conscious of what you do and following the creed which is to harm none. Good luck, blessed be and do contact me if you need any help. I've been a witch since I was 15, and so have got 18 years of practice under my belt. For the first few years it was something I did in secret, my friends and supporters, my mentors and teachers were online since I was born a Muslim and I just couldn't come out in the open with my beliefs at that point in time.