I already build a PC in the Core V1 and its a really great case.
The Core V1 is a Mini ITX Case therefor you Matx Motherboard doenst fit inside the Case.
The Powersupply does fit but i would recommend a Modular one since there is not a lot of space for cables.
Rx460 should fit just fine and same for ram.
You either have to take a different Mobo and maybe a different PSU if possible or you go with the Core V21.
The Core V21 is an Matx Case that will fit all of your listed components