It's a bit tricky nowadays to find a solid game. There's plenty of LFG things on either Reddit or any of the discords for your desired TTRPG - usually numbers favor DnD5e, but there's a fair few on Pathfinder 2e nowadays too.

However, the best luck I've had in more recent years has been on startplaying.games - where you can find a paid DM/GM. (Not a shill, just what I have personally experienced)

I could go into what I believe the benefits of a paid vs unpaid game are, but that's a lot of extra for just this.