I don't think it's necessary to limit the number of classes. Especially when players might not even interact if they don't want to.
Williams, regarding the equipment: is the red robe in the inventory or not? And also, I forgot to mention, but an additional skill is needed; please specify. Although, for your class, "fire magic" would be better, otherwise, there will be problems with learning fire magic beyond the first level. You can choose another skill if magic is intended as a secondary action for the character.