A successful career start is not a matter of luck: it depends largely on whether you find the tasks and working environment that match your personal potential and values. The more precisely you are aware of your own expectations and potentials, the more successful you will be.
You can find free-of-charge personality tests at https://karrierebibel.de/psychotest-uebersicht/
An example of useful self reflection advice is the respective website of the Imperial College London career service: www.imperial.ac.uk/careers/plan-your-career/self-reflection/
