Where do you get more drums, keyboards etc. ?

Okay this might sound like a really stupid question but please bare with me, I'm fairly new and I've finally figured out how to actually put stuff into the channel rack and playlist lol, but I was wondering if there's any way to get more instruments if that makes sense, other than just the default set of kicks or hats for example? Thank u in advance for any answers and soz if this doesn't make sense :)

Edit: Thank you so much for the answers and tips!! You guys have told me abt stuff I didn't even know was a thing 😭