Imposter Syndrome isn’t reserved for a few.
Almost everyone suffers from it, multiple times during their lifetime.
Thus, coming up with a process is the way to deal with it:
Helpful vs best. You cannot be the best in world yet whatever you do and know, use it to help people
There will always be someone better than you. That automatically takes off a lot of load.
Try not to be the imposter that you were. Being a little better than yesterday is the best progress. You’re giving yourself time.
For anything that is recurring, process is power.