A simple datapack requiring Villager API which adds 3 villager proffesions
Miner - Sells ingots, stone/andesite/etc and/or pickaxes and light-sources [Workstation = Anvil]
Alchemist - Sells and buys potion ingredients [Workstation - Alchemy Table (Brewing Stand on top of Crafting Table)]
Tinkerer - Sells Create mod items like Andesite Alloy or cogs. Does require the create mod but if you do not have it it should be ignored [Workstation - Mechanical Crafter]
The file needs to be unzipped into the "villagerpacks" folder created by Villagers API. Or manually created/added at the root folder (The folder of your profile, where you can see the "mods" and "shaders" folders)
Meaning the adress should look something like*\curseforge\minecraft\Instances\[Your Minecraft Profile]\villagerpacks\more_professions_m_t_a