I love posting to both Substack and Nostr. I get more reach on Substack, but frequently get more interaction on Nostr. I usually type and format on Substack and paste it into highlighter.com to post on Nostr. For some reason it copies an unformatted copy and then a perfectly formatted copy into highlighter. I don't know why, but it is easy to select and delete the unformatted copy. I used to paste into habla, but not all of the formatting came over correctly and those errors took more time to find and fix, although I like Habla better if creating and formatting a post specifically for Nostr and want to do the formatting directly on Nostr. I don't know if this helps, but I'd be happy to answer any questions.