What should i put in "type": if im adding a modded loot table to loot tables json? is it still minecraft:loot_table?? or it has to be something else? and how do i know what type it has?

oh you probably got confused, the example with "type" is how to create a vanilla loottable, which you then in turn can use in this mods custom json as ID. Since you already seem to have a modded loottable you want to add you can just add the ID and you're done, see for example: https://github.com/someaddons/LootIntegrations/blob/1.16/src/main/resources/data/lootintegrations/loot/dungeonloot_easy.json

medium.json
What i mean is that loot tables json, am i doing something wrong with that one?