Then I would get in touch with nostr:npub1xdtducdnjerex88gkg2qk2atsdlqsyxqaag4h05jmcpyspqt30wscmntxy the creator of npub.pro, nsec.app & nostr.band. it's entirely possible a blog kind could be added if there is demand, then you just need an editor for them. Probably not that hard to modify current long form article editors, since the content is virtually identical.
Discussion
Or even a change to the current nip to put a tag on the event that specifies the kind of long form content would achieve a similar effect, not break previous notes and allow old blog entries to be replaced with the new blog tag. That's the best way forward imo.
Should there be any different fields/tags in blog events (except for different kind number)? A different way to display them, different client UI?
Client UI for creation stories be relatively the same. A switch to pick between big and article would be great. (Adds a tag to the event, indicating a blog.) Then you can filter feed by all articles or just blogs.