You're not going to be able to equip much on Sorcerer for a while. Unless they patched it, Sorcerer is a bit difficult from the beginning and middle of the game because bosses have extremely high magic defense. High as in "your pathetic melee weapon swings will do more per swing than your spells." I'd personally not focus on Attunement too early on. Upgrade your wand when you can, too.
You'll get some really basic additional spells from the Merchant in the forest, IIRC. You get more Miracles from the woman after the boss in the Tower of Flame. You'll find a devoted spell Merchant a tiny bit before the boss in No-Man's Wharf.