I'd like to change my behaviour, but haven't got an idea of where to search?

I want to be able to use something that can set me on the right path in how I behave to other people.

I got into a debate that I didn't understand and ended up being called out by the OP. He's probably going to look down on me or think less of me because I made a statement. I'd like to remain on the positive side of acquaintance.

But this path is probably already closed off. In future, how can I find ways to manage my behaviour and avoid conflict? Thanks in advance.