Stop putting so much damn pressure
on yourself.
You are not in a life-or-death situation.
If you make a mistake
(what classifies a mistake anyway?)
there will be opportunities to do better next time.

If you keep holding out
scared of imagined consequences
preparing for remediation of the fallout
without taking action at all,
you will kill yourself
before getting a chance to see the success
beyond the worrying,
unwarranted.