[Bungleau]

Short answer on enchanting and blessing (and paraphrasing what's in best tips):

You learn the occultist or cabalist trait first, around guild level 3. Then you start learning the enchanting or blessing trait. Every level of enchant or bless is one enchantment you can do. Not all things get all enchantments.

To cast an enchantment, there's one other thing you need: the Artifact of spell.

Put all three together, add some gold, and away you go!