I need one for the school, and maybe for playing older games like Warcraft 3, Half Life and possibly also WoW if possible.
The laptop can't cost more than 600 euro. In addition, he must be from Saturn, Media Markt or Medimax, because my father can only pay with installments. And pay online with installments does not work. Besides, my dad does not really trust the internet.
Could you recommend a laptop for me?
The sites or stores you mentioned do not have the best value for money on laptops. At least I was aware of this at Saturn or Media Markt before. I've never looked at Medimax before, but even here I can hardly believe that, for example, a device with an i3-8145U is available for 530 euro. For example, you get a device for 400 euro somewhere else, which is more powerful despite the price difference of 130 euro. The same applies as I said for Saturn and Media Markt. Since you also pay well and happy times to the 100 euro more for a device that you get elsewhere in terms of performance also cheaper.
In any case, I would recommend a multimedia device with a processor from Intel Core i5 or alternatively an AMD Ryzen 5 in your case. To gamble a dedicated graphics card would be useful, but you will not get in your price range. Would therefore rather rely on a processor from AMD, because here the integrated graphics unit is more powerful than that of Intel. In addition, 8 GB of RAM and a 256 GB SSD.
Here is a device from ASUS for 499 euro: https://www.saturn.de/...91838.html
It is a 15.6-inch device with a Full HD display. Installed are an AMD Ryzen 5 3500U, 8 GB RAM and a large 512 GB SSD. In addition, Windows 10 Home is already preinstalled.