You must know your basics--its easier. I am taking in some apprentices, so if you want to be one of mine, just message me. :)
Here are some of the basics:
Days of the Week and their meanings
Energy Flow & Control
Colors and their meanings
Spirit Guides (if you want)
I would learn shielding before anything else. It's safer to cast spells, because casting spells is dangerous. You can read some of the articles and write notes in a notebook. Writing helps your brain remember it. It's good to practice meditating, shielding, grounding, and centering.
Learn the basics in general BEFORE you cast spells. If you wonder why they don't work, if you don't know how to write spells, if you don't know the right time to cast spells, then you haven't learned the basics.