I would like to know that I (tutaj cos brakuje) doing something important and necessary.
I know that my hard work and persistence will help me achieve greater professional success (tutaj brakuje 2 slowa ...po polsku, 'i to jest') is what keeps me going. Relationships between people, new friends, stable work and good earnings 'also very motivate me' (nie zrob to inaczej....motivate me 'jak')