On Lemmy you can go to your profile settings and turn off “Show scores”. Now you won’t have to keep checking your post’s rating and compare it to others.
In general people will flock to quality content. Those other accounts you’re comparing yourself to could be 10 years old by now and have a good following, just keep doing what you do and you’ll slowly build a fanbase. No need to compare yourself to people who get lucky or were there before you.