How far did you get with this?
I have been using Nostr plugin for Obsidian but
1. Image upload is now broken. Articles still publish just without any image, and I have to upload them separately.
2. "d" tag is a random string, but many clients use this as a URL, so ideally I would use keywords or a string derived from the title.
3. Two-way sync between Nostr and the vault would be a killer feature.