Just knowing that half of the young adults in your country are unemployed is probably adding to the pressure you feel. If you don't mind writing, it might be helpful to sit down when you get home from work and make a list of the things that went well that day, areas you are growing, etc. Then jot down a few of the areas you want to work on (not beating yourself up for errors - just areas where you still need to grow) and how you plan to do that.

Getting it out of your head and onto paper should be helpful. When those nasty negative thoughts creep into your head about the 'mistakes' you have made, you can tell yourself 'No, I am progressing nicely and I have a plan for how I am going to continue to grow in my new job'.