I remember chatting with random people on Skype, but that was a while back dunno how it is now. Dunno what happened to all the old school chat apps that had rooms to join and fool around with random people. You could try Discord and google groups with similar interests.
Remember to stay safe and mindful of your privacy when chatting with strangers online. I've tried a few random chat apps, and one that I found pretty interesting is omegle.
Omegle shut down last autumn, if I remember correctly. I read about it back then. As for safety, I join the warnings - one must be very, very careful. This cannot be said enough times.