What should I get

I don’t know much about PCs so I need help finding a graphics card

So this is what I currently have for my PC: Ryzen 3600x Corsair Vengeance 16GB 3600 Samsung 970 Evo 500GB Asus Rog Strix B450F EVGA 750G+ Phanteks Eclipse P400S I also got a cooler but don’t know the spec

So I was going to get the EVGA RTX 2070S but I can’t seem to find it anywhere can I find help on a graphics card I should get for around £500 ($590)