you might want to be a bit more specific. there are many paths so someone who works with Voodoo could take you on as a student, but you wish to learn Celtic Witchcraft. these are two separate paths with separate views, beliefs, practices, and teachings so narrowing down your path would be helpful. also, not many people accept students on this site for various reasons, be a little picky with whose advice you take, as some people might have good intentions, but little understanding. i suggest reading some articles on 'the basics', and start meditation and energy work to help you.
that's a PDF of Raymond Bucklands Complete Book of Witchcraft. it's an excellent book for beginners as it has information, exercises, and questions at the end of each chapter to help you learn [though i do recommend buying a copy, it's understandable if you can't for whatever reason]