you need to study for a year and a day. that's pretty much it. granted wicca is the pursuit of knowledge, and no one's ever done studying but to be 'qualified' [not the right word, but it's close enough] to be considered a wiccan and to join the craft, you should know the basics, that's why in wicca we have the year and a day ceremony. in this year and a day [let's say starting from now] you must devote a portion of your time EVERY DAY [let's say minimum one hour to start] reading, researching, studying, and/or practicing wicca. it is encouraged to cast spells, but start small, like candle magic, and you should attend [if you have or know of a coven, if not you should yourself] every sabbat and full moon circle. it will teach you many things, and what better way to learn than to do? ostara's this month and the next full moon is in a week, so you should try at do both, if you can only cast for one, oastara would be better.
after your year and a day, you can do the initiation ceremony, and you're a wiccan. technically though, you become one once you say you are, but you should do the year and a day so you understand what this path is.