You could start by doing a simple protection spell, thats usually the first thing you should do anyway. You could follow it with any other spell you want to do ;)
Wizard is an odd word to use here, a lot of people have their own little definitions of it so I wouldn't suggest classifying anything here as wizardry.
However, you do not need to be classified as anything in order to cast spells period. Now certain rituals can be pretty esoteric but as far as spells are concerned, you don't need to worry about it.
I have joined just today and have not yet cast any spells but still i can tell you to be fearless, courageous,have positive thinking and enough positive energy and I know you will be hundred percent successful.
Start with the Basics, they can be found through Google or another search engine, if they are difficult to find,
add 'magick, pagan, occult, wicca' ect to the search.
The basics are as follows:
Shielding
Grounding
Centering
Circle Casting
Meditation
Colors and their meanings
Moon Phases and their meanings
Days and their meanings
Hours and their meanings
Herbs and magick Tools (Stones, wands, altars, ect)
Visualization
Energy Manipulation
Astral Projection and the Planes of Existence
Charms and Chakras
Elements
Astrology
Aswell as your signs and spiritual attachments, Zodiac and elements,
totems, ect. Which can depend on your birthdate, and others require spiritual
guidance through meditation or dreaming. Communication with your spririt guide(s)
can also help you on your experience.
To run down the basics, If you want to learn how to write, or properly cast spells
YOU NEED TO LEARN THESE. There is short cut to truely participating in this practice
without this essential knowledge. You study until you have these memorized, and you may
forget a few along the way. As long as you keep practicing, is as long as you will remember.