How do you find early adopters?

Do you have any process to reach them? I think I'm using alot of channels to reach my target personas, but they are not all early adopters so the conversion rate is low

Figure out where they hang before you build.

👆 This!!!

I would even take an extra step back and say: figure out what they want before you build.

by spending the minimum effort to attract them.

it could be a blog post, a twitter post, reddit post, mini tool website etc, to see if there is interest.

Reddit is a great start, just find the right community.
I was surprised when I got a few private messages on Reddit from those early adopters (people genuinely excited about using my app)

depends on the project, for developer's tool I use twitter, for digital creator I contact them directly via instagram