Have you checked out the “help” section found at the top of the page? In a nutshell, if you read something someone has posted and you want to reply, just click on the “post reply” button at the top or bottom of the page and write whatever you want to say. If you want to quote something specific, click on the “quote” button in the lower right corner of that post. You can highlight and delete some of it if it’s a long post, but don’t mess with the string of characters right at the beginning and end of the quoted section, or you’ll mess up the formatting. When you’re finished, click on “preview post” if you want to proofread it first; otherwise “submit reply” and you’re all set. Hope this helps. 
Do you have any other questions?Are you speaking of technical difficulties or a problem with the tone of some of the posts?
Will keep you in prayer that your problem(s) will sort themselves out.
You can always PM a moderator too who will put you on the right track…Amen.I will pray that you get the hang of it soon.