I'm looking to upgrade my computers graphics from integrated graphics to a dedicated graphics card. My question is two fold:
this is indeed a PCIe slot (x16).
The built-in GPU could possibly make it for low/medium settings but if you want high / play to other games, I would recommand a little card like a 1050Ti (roughly 170€ / 160£ / 170$).
However, you have to know that this CPU is not the best for gaming and could limit with games relying a lot on CPU.
Rx 560 and Gtx 1050Ti are way to go according to your needs but your processor doesn't seem to get full use of these graphics card if possible upgrade to minimum ryzen 3 or intel i3 otherwise you can get 40+ fps on high settings with your amd apu buy any of them which is cheaper in your country and you can see benchmarks on YouTube with your apu paired with these two Gpus.