…one thing that bugs me in particular is that there are two signups on the site: one for bbPress and another for the blog post notification. I would love to integrate these two things. Any pointers on how to do so would be appreciated.
The one aspect I found a little confusing was the links to the blog and forum. Perhaps if you make the point size larger, or add text coloring, those words would pop out. The tabbed color coding is fine, it’s just that the point size does not stand out from the rest of the text on the page. Overall, though, I like the look and feel of your site. Well done!
In regards to your question, have you read this page on the bbPress site?
https://bbpress.org/documentation/integration-with-wordpress/
Scroll down to where it says “Registration”. I hope that helps.