Some switch testers will come with caps. Otherwise you can just get blank caps rather cheaply and put them on. If you want a slightly more in-depth experience,

Some switch testers will come with caps. Otherwise you can just get blank caps rather cheaply and put them on. If you want a slightly more in-depth experience, there are hotswap macro pads that will let you change out switches, with keycaps, and actually input things with them. The only other option is to track down a keyboard meetup, at least that will be an option against post covid.