What should i learn exactly to become a database administrator or data analyst?

SQL is quite a good start. If you want to get knowledge in data mining, big data and souch mysteries, the next step is python then R language, noSQL and Haddoop. Good Luck and keep learning!

start with sql

Yes i am well aware with mysql i think next i should learn python. But what is a best language combination for this type of career and also the minimum requirements?