Build a Website were you display different components for inspiration (footers, hero, navbar, etc.) also let members upload components(images) for inspiration. Membership can be created with Memberstack and add the components to the CMS.
A forum can add value to your website especially if you have an active community behind it that not only engages with your great content but also gives them the power to interact with each other. You can add forums to your Webflow site with Discourse. Fun fact : Webflow's forum runs on Discourse.
Learn how to build a basic membership site with MemberStack. Very easy to follow Tutorial with Duncan, this is great for membership and gated content on your webflow site.
Create a (30-day, 20-day, 10-day) learning program dashboard for users to follow. Inspired by HelloRemote.