Building a new pc from scratch // Have only DDR 4 64gb

Hello everyone .
I want to buy / make new cpu from scratch.

• I want to buy / make new cpu from scratch.
• I got only 2 x 32 gb DDR 4 ram hyperX predator 3600 cl18
• this cpu should be for gaming purpose mainly
• Poland Europe
• 2 monitors i would like to have
• budget is around 3,5 k usd ( 10k polish zł )
• wired internet
• doesnt matter size
• black color with some leds
• Any other specific needs?
• Want to make it around RAM i already got
• Thanks for any advice