Villager apprenticeship

When a villager reaches master level the player would have to pay 10 emeralds for an apprenticeship. The player would get 1-2 armor pieces depending on what they  chose, here at some examples: if the player chose cleric they would get a scarf, a cartographer would give them a monocle. Under the apprenticeship the player will learn more about the villagers professions and where they get the stuff they trade. When a player completes their apprenticeship they can open their own shop where villagers will trade and bargain with the player.