For the first time I have a little more money available. What now?!

A few years ago my father bought me a car and I paid it off in small, ridiculous installments. Now I'm going to sell it because I drive a company car and 2 cars for one person just costs money. Hopefully I will get around 13 - 15 K€ and plus the 6K€ that I have put aside, I will soon have more money than ever in my life. Now I'm looking for an initial idea of ​​what I should do best with the money. I want a part