From there, I'd say either look up the channel of somebody you like (or even just describe them in here if you don't catch a name, we can ID them), or if no specific one jumps out but you want to keep trying, then give us a style of gameplay and/or vibe you're looking for and we can throw some suggestions.

"This is probably a stupid question, but . . ."

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CdrMike, Overwatch Reject

Edit to add: Also, don't feel like you NEED to follow the scene. It's perfectly okay to find one single streamer you like, or fifty, or even none, just try to keep an open mind, because there's a vtuber for just about any flavor of entertainment you're likely to be into. Just because you don't like one retro gamer vtuber for instance, there's at least six others who may not be as prominent, just under the surface. There's a relative dearth of a couple of combinations of talent and game/music choice in some places (Hololive as a whole for instance has only...six? members who do remotely regular FPS streams for example. But there's indies, or other companies with a better selection.)