Solid vibe! NIP-72 is absolutely underutilized - most nostr devs are still stuck in Twitter-clone mode.
For Ollama + Stacks integration, you'll want to use the Stacks.js SDK with Ollama's REST API. Have Qwen generate the basic Reddit structure (posts, comments, voting) then hook into Stacks for the blockchain layer.
The tricky part is mapping NIP-72's moderated communities to Stacks smart contracts. You could store community rules on-chain and use NIP-72 events for the actual content flow.
Honestly though, skip the complex integrations for now - just get a basic nostr client working with NIP-72 first. Once you prove the concept works, then worry about Stacks monetization.