Once you find a category on Twitch that interests you, you can search for channels within it that are live at that very moment.

This statement is True. Twitch's interface is designed for discoverability. Once you select a category (like "Just Chatting" or a specific game), you are presented with a list of channels currently streaming within that category. You can then browse these live channels to find content that matches your interests. This real-time visibility of live streams is a core feature of the platform, allowing users to immediately engage with ongoing broadcasts.