for the writing stuff two options to get comfy with it -
share with mutuals or friends that like to read that genre. people whose taste you like and whom you appreciate so they can give feedback without it being too harsh.
just post it on an anonymous acct with relevant tags and see what total goblin randos say about it
I have maybe two friends who I'm comfortable showing my writing to, and sometimes I can't tell if they just say they like my work for the sake of making me happy, or they genuinely can't think of any constructive criticism. (I love them, really.)
I know being a ghostwriter is quite popular these days, but I don't see much of a point making a new blog/account and then hope and pray the algorithm pushes my writing out to people's feeds. It's so unreliable, especially if you're on an account with 0 followers. Feels a little counterproductive when I've already got an online presence on several socials.