Happy to help contribute to these! I think the tag hierarchy on StashDB is one of the most cleanly organized ways to categorize porn and could be useful here.
I would definitely be willing to help with that. Helping users to find exactly the content they're looking for will be huge as this place grows. It'll also help with finding related content people didn't even know they wanted.
Love to help, no idea how. Very new to this and not sure how to find anything. If you can train me on that, I'll spend time searching and logging stuff in the list.