Wanting to download cc but I don’t know where to start or how etc

I have a question regarding mods. I have the Sims 4 and somw mods already. If I were to download my game onto a new computer would my mods transfer through Origin or would I have to save them and redownload them? My sister has the base game and I have some expansion packs she would really like but I jave the WickedWhims mod and I really don't think she would like it, considering she has younng kids playing the game as well. If she were to download the games off my origin would it transfer my mods with it?