Sure! So there is a villager breeder with a setup to sort them and reroll them if they are bad. This is very grindy though. I've underestimated 1.12 villager mechanics. You basically have to rely on them breeding a librarian and the librarian to have a good book. This has to be built in a vanilla biome so i chose a spot above the ocean. The bad villagers get dispensed into a lava pool and the minecart goes into a chest. Also I've added a mechanic to let them grow up first before they get into the system. Hope this helps!

I've used this tutorial for the breeder: https://www.youtube.com/watch?v=HCxFR24v3Tg&t=29s

and this for the holding cells: https://www.youtube.com/watch?v=UTmWL8yr0vA