Read, read, and read....
The best advice that I can give to someone in your situation (complete beginner) is to get a book or two on the subject and immerse yourself at your own pace. The books can supplement the other fine suggestions above.
If you can find a copy, The Curtis Creek Manifesto is one of the best possible books for a beginner. You may get some other suggestions, and I hope that you do. But IMHO the manifesto is spot on for entry level folks.
Good luck, and enjoy.