Hello Aero GT
I wouldn't personally buy a computer off amazon. The computer seems okay but that graphics card is pretty weak, and plus we don't know what type of power supply is in that computer.
It would be better to build a computer, though to make something decent in my opinion you will need a bigger budget. If that isn't possible, you might wanna buy parts over time or just save up for a better computer.. 300 euros (which is around 430usd) isn't much for a computer for a gaming PC.
In this building thread
there is a 500USD amd build, which in the end runs about 530USD(375isheuros). I think it would be worth saving up for that.