I got a new job recently and I start at the end of the month. I'm really excited for it and I can't wait to start.

I do suffer from anxiety and depression but it hasn't been as bad recently.

I have previously been fired from a job and I felt like this was due to my imposter syndrome. (It wasn't it was just due to lack of experience in the role and no one was there to help train me properly) 

How do I stop this from happening again?