If you don't "get" TikTok because your hobbies don't map well to video snippets -- stuff like makeup, art, fashion, cooking, baking, dance, inde music, cosplay, interior decorating -- don't write it off. It's basically a social media paradise for women[1]. Like the early days of Tumblr but replace gifs with videos.
[1] TikTok's format lends itself to hobbies stereotypically cultivated by women. The implication doesn't go the other way; loads of guys on TikTok. It also doesn't imply that every woman will find like it; don't @ me with logical fallacies.