User blog comment:Atvelonis/Elder Scrolls Games 60 - 75% off on Steam/@comment-25350022-20151129012642/@comment-6881629-20151129093434

You buy spells from spell merchants like Arrille (the trader in the town you first arrive in). Recover magicka by resting unless you picked the Atronach birth sign, then it's just by potion or absorption.