You need to search and then scroll and like stuff and follow people to get any signal in TikTok. There is a ton of great content. For example, maybe you are into weightlifting or gardening. Search for a particular aspect of weightlifting like "rear delts" or for gardening "pruning" and like some stuff or follow some creators you like. Rinse and repeat a few times. It doesn't take long to fine tune a feed that is pretty good.