High Priest Marie:
Of course, the Wizard is no exception. Anyone wishing to become a Wizard must have achieved at least level 20 and passed the appropriate test.
Your level is adequate, but you haven't passed the test. Speak with Parina about taking the test. Collect proof of all 4 elements and she'll give you the Bead of Season. Bring it to me and I'll make you a Wizard!