What kind of laptop should I buy (school and games)?

I have about 500 euro. You should be able to use it well for school and maybe play some games on it (fortnite vllt?)

Lenovo think pad

You do not even get a laptop for 500 euro where you would be satisfied with Internet surfing.

Acceptable laptops are available from 800 euro.

If you only use a "laptop" at home, you can build a PC yourself.
You can reach 4 times more with 500 euro than with a 500 euro laptop

Wait until Christmas. Because you will surely get money from relatives and acquaintances. With this money, you will buy a good gamer laptop from ASUS in January 2019. There you have more of it.