At Worldcon 76, I was fortunate to be a speaker on a panel addressing imposter syndrome. The panel was excellently moderated and touched on a number of points that people with imposter syndrome can use to move forward. Some of the techniques discussed to help "make it to the end credits" included using writing as a cathartic release, viewing your insecurities as monsters that you can conquer, #buildaladder by adding rungs - no matter how small - to help you climb out of your darkness, learn to say "thank you" and to accept praise, or to reward yourself with something positive, like "cake".
Latinx author and publisher E.M. Markoff writes about damaged heroes and imperfect villains. Works include The Deadbringr, To Nurture & Kill, and "Leaving the #9." Under her imprint Tomes & Coffee Press, she published Tales for the Camp Fire, a charity anthology to raise money for California wildfire recovery and relief efforts. She is a member of the Horror Writers Association and is mostly made up of coffee, cat hair, and whiskey.