Maybe !Forums@sh.itjust.works? If your blog can talk to ActivityPub, it should act as a community with restrict posting, so I'd imagine it could be seen as an one-poster forum.

Also could recommend niche-specific communities, such as !games@lemmy.world, !linguistics@mander.xyz, !foto@feddit.dk / !photography@discuss.online, etc., all depending on what you post.

If you are on WordPress you can post directly to a relevant Lemmy community by @ mentioning it when you have the ActivityPub plugin.