Please help me building my first pc

I want to build a pc for around 500Euro. Can you help me with the parts I need to get a good gaming pc? Can I get a pc with wireless internet connection? I hope you guys can help me out

Choose parts from here:

You can buy a wireless card for a PCI slot, yes.

Can a setup from around 550 euro play any game?

Yes, on normal to high settings it should.

I am new in the building world. Sow can you help me with the parts that i should get. Can you give a list?

This one is more all rounded if you only want to game you might be better of with logans version.

and where can i find these parts?