Not sure what you mean by the "main page" - the "Karl's Tapes" category page?

To add further tape pages, you need to go to the page for that page and add the "Karl's Tapes" category.

If you want to edit the category page itself (currently says only "A page for Karl's 1980s Mixtapes"), just click on edit, write whatever it is, then clock "Publish".

Isn't locked or anything.

SW