Once you have downloaded a mod via any of the links in this guide, make sure to copy the file from your downloads folder (unzip it first if needed), then place it in your mods folder via the following file path: Since their recent collaboration, many Sims modders have uploaded their work via Curseforge here. You may also wish to back up your saved file before implementing mods to avoid save file corruption.
When downloading CC and mods make sure it's from a reputable source.