I will check those reddits, though should people create a different account when going there?
I haven't used those reddits, and I don't have a reddit account anyway.
I think the fact it occurred to you to ask, suggests an answer. If you would feel safer testing the water with a different account, then I'd recommend you do that.
People have an annoying habit of attributing expressed thoughts to a person long after the person has openly changed their mind, as well as misunderstanding the intended meaning of a stated view anyway. Same if the person was just constructing an argument for the purpose of thinking things through (for example as in devil's advocate).
Personally, I would also recommend a "listen first" approach.
The internet is not just a place for meeting people and discussing opinions.
For many, many people, the internet is a socially supportive space, and an activity space, and those things don't work if challenging discussions are constantly taking place in them.
For what you've just asked for, specifically about making arguments that might change your mind, may I suggest you might enjoy: https://www.reddit.com/r/changemyview/ and https://changemyview.net/subreddit/ (I haven't used them myself, just read about them.)