Welcome to lemmy!

I agree, I think because there are fewer people the community vibes are stronger.

There are plenty of silly communities if you can find them. I like tenforward and dullsters (formerly dull men’s club). The historic memes subs are surprisingly popular, programming humour gets a lot of engagement too. There are trek and LoTR memes, and a lot of webcomics get posted (but don’t have the creator community of reddit).

As long as the silliness is in good taste, I say be the change you want to see and people will follow.