Begin your own book of shadows. It is no different to learning an academic curriculum which is complimented by mastering practical aspects. Select and begin working with a divination tool early. As well as books on basic witchcraft, don't forget to cover mythology. This is perhaps why the tarot is such a great learning tool - it actually does teach you much mythology. It also teaches you about life, which is an important aspect of the path the wisdom. As for the moon phases - if you study witchcraft for any length of time you will find that awareness of the lunar cycle is a fairly central theme in developing a connection to the rhythms of nature and the Goddess energy.
As a starting point the traditional study is for a year and a day.
I wish you much success on your journey