I just created an account and I don't know how to leave comments on post nor can I seem to log back into my account right after I made it. (Even tried changing the password and checked if I misspelt my email or passwords but nothing)
Do you mean posts on the forums? Like threads? You just click on the thread and scroll all the way to the bottom and there should be a place to post a reply
If you mean the profiles on the main site, the accounts to comment on them are different from the forums profiles. But I’m not 100% sure how to create a profile to comment on those
Disqus (the program we use for the comment section on posts) has been somewhat glitchy regarding commenting. I would recommend clearing your cache, or contacting an admin about this issue.