How to create a forum section?

Check inside your host cpanel for addons / plugins. Usually under softaculous. Look for phpBB (bulletin board) or any other forum equivalent. You could install it then read carefully on configuring it. But, I do think your users would need to create logins or else, you'd have every flyby rogue bot spamming your forum making it difficult to clean up. I've seen forums from reputable websites full of spammy adverts and links. The trick is to configure the forum to include anti-spamming measures, captchas or " I am not a robot " questions for verification . Taking the time to do this, saves heartache in the end.