I’ve spent years arguing with people online and really have nothing to show for it aside from my own education and amusement. I was radicalized by discovering r/chapotraphouse back in 2018 I think. Nobody argued with me there, I just lurked, loved the memes, thought it was the funniest place online, then started reading theory because so many people there talked about it. Even though liberals are obviously ignorant about communism, their ignorance is willful: they never thank us for educating them, they always get angry and double-down. (In real life, it’s much easier to embarrass them and get them to shut up.) Still, I admit that it’s possible to change someone’s mind in an online debate, I just haven’t seen it happen when it comes to communism (libs on r/changemyview can change their minds about lib shit). Have you ever seen a lib admit that they were wrong about communism?
There's a few now, I stick to one that a Portuguese firm operates the frontend for. Fair warning, you're going to get flashed a lot. Just like Omegle. There's a few websites that all connect you to the same pool of chatters. There's Minichat dot Com, Chatruletka dot Com, Ome dot TV - again all effectively the same.
You need a fake VK or Facebook account, but those are easy to sign up. Just don't stand up, they run a JavaScript image recognition model in the web browser that checks your chat partner's webcam feed for things they'd like to ban people for.
There's some other ones... Emerald, Monkey, Chat Roulette, Chat Random, etc.