So far, most of the mods I've downloaded simply require transferring a mod folder to the override folder. Others come with an installer like DAZip which makes things easy.
I just downloaded the "Additional clothing for kids" mod and transferred its folder into override and got no change. What did I do wrong?
That's not a 'mod' or a clothing replacer. It's a modder's resource that adds new/additional models to the game. To see them in-game, those models have to be manually added, to each individual child NPC, via the toolset . (Or possibly with a GFF editor... I added them to my game with the toolset, though, so that's the method I'm certain of.)