“When you use Signal, your data is stored in encrypted form on your devices. The only information that is stored on the Signal servers for each account is the phone number you registered with, the date and time you joined the service, and the date you last logged on.”
Same, I tried to move to Signal a couple years ago, but I couldn’t get anybody except one friend to follow, so I gave up on it. I would try again, but I know it wouldn’t go any different, yet.