Self or Ourselves or Oneself
The proper word for this is ourself, which is the singular reflexive pronoun corresponding to we, because each of us is a singular construction, even though us is first person plural.
This word is in the Lexico dictionary (although it is not used very often):
ourself: first person plural
- Used instead of “ourselves,” typically when “we” refers to people in general rather than a definite group of people.
[reflexive] ‘we must choose which aspects of ourself to express to the world’
You could use ourselves in Lexico's example, but only ourself works well in the OP's sentence.