Just want to add something about a chat I had with a friend last week.

In the real world, you might not be able to find players for the game you want to play, or some might be easy to find. For example, my friend has been easily able to find people who want to play 5e; he runs two games of that. Last year, he could only find one person who is interested in playing Pathfinder Second Edition.

Online, you can probably find lots of people willing to play all kinds of things (well, maybe not something really obscure!). I don't know the names of such websites though. Perhaps someone knows?