How do I interact with my audience?

I started The Plunge to bring more clarity about longevity. There are a few creators that I know have audiences who are my target, creators I follow on Twitter and whose content I curate into my newsletter.

(Like everyone) I want to get people viewing my newsletter who can provide feedback on whether I'm on the right track. I have a lot of ideas for building digital content for these users - not curation but rather posts that give them clarity about one subject or another.

I'm hesitant about sinking my time into writing posts without a group that I can get feedback from.

I went through some of the Building in Public reference documents, but in looking through subreddits, the groups I've found are much more science focused than I'm looking for.

I'm afraid I'm just being lazy but as I get into these groups, I'm intimidated by the audience being either much more science-focused than I'm looking for or having no idea how to interact.

Am I just being lazy and need to put more time toward this side of things? This validation is where I always struggle and need to improve or this will be just another dead side-project.