I started when it was still called TextSecure, I had precisely 1 contact (just my nerdy friend from uni) for the first 3 years. I then convinced my partner to install it, had 2 contacts for the next few years.

When it became Signal, a few more jumped on. Once I had kids; I bullied my family onto it, by refusing to send photos any other way.

I have 62 contacts now, the bulk of my digital communication is through either Signal, phone, email or Lemmy. There is a little SMS/RCS.

It has been a 15 year journey so far, for me. You will get there.