Download 1.14.4 Villager Trades PNG. This turned into a bit of a wall of text but feel free to ask i cured a zombie villager and apparently that gives you really good discounts because it trades an emerald for only 3 sweet berries. Also as of 1.14, all villagers first spawn as an unemployed villager and receive a job by being close to a particular job block (e.g.
Ever since the 1.14.4 update, that buffed their trades and can work all day even when they don't restock, they actually will restock whenever they do their work after their trades. When a villager has a trade you're satisfied with you can make a trade with them to lock them into a profession. Building trade data is complicated and takes some time.
Custom villagers show up with the career name of:
Easier villager trading mod 1.16.3/1.15.2 is a mod for people who trade with villagers a lot. Here is a little guide for best trading with your villagers firends. Display as fisherman but when you open trade they show up as farmer, shepard. And, changing at will their profession, to obtain certain abilities and different.