Where do I start?

My main goal with joining SCS is to improve the way that I feel about my job and to become the best employee that I can be. At the moment I have huge stress and anxiety around it and lots of insecurities about my abilities, lots of negative thoughts about my boss. Basically, I currently feel pretty miserable about everything to do with my job.

This covers so many areas that I don’t know where to start and have become a bit overwhelmed with all the material available in SCS. Is there a module in the study vault that you would recommend that I start with?