Actually I believe a new member's first 5 posts have to be reviewed & approved by admin before they are posted for the general membership to read. Two ways to reply in this thread would be to click on the "Quick" icon in the lower right-hand corner of one of the boxes in the thread. (The "Quick" icon is in the middle of the row with "Quote" & "Multi" to its left & "Thanks" & "Hugs" on its right.) Then, write your reply in the box at the bottom of the page. You can then post it by clicking on "Post Quick Reply" or you can click on "Go Advanced" if you want do more with it such as add emoticons.
The other option is to click on the "Post Reply" icon in the lower left-hand corner of the page just below the last reply. When you click on this icon it takes you to the same place you go when you click on "Go Advanced" after typing something in the "Quick" reply box. Once you've finished typing your reply in the "Go Advanced" or "Post Reply" box, click on the "Submit Reply" icon below the box that contains all of the emoticons to "publish" your reply. Or, the other alternative is to click on "Preview Post" if you want re-read, & possibly make changes in, what you've written before you submit it. Does that make sense?

(Hope so...)
If you're still having difficulty navigating the site, feel free to personal message me. I don't know everything... by a long shot.

But I'll try to help out where I can.