Beginning Witchcraft is a very big thing. So take your time and enjoy it. Learn at your own pace and don't pressure or force yourself.
First you need to be sure that you want to be a Witch and practice the craft and live your life on Nature's path. Get to know yourself through meditation and putting yourself into traces.
Then you should make a Book Of Shadows or a Grimoire to keep your research in. You also keep information on Herbs, crystals. Also spells, Deities and such.
You shouldn't jump into spells right away ether. Spell casting is a big part of Wicca and one of the biggest attractions too. But spells won't work if you don't know how to cast them.
Take your time with it and have fun. It really is such a beautiful thing to have in your life.