Cpu calls for 3200mhz,will 3600mhz hurt my cpu?
What is the make/model of your motherboard?
3200 speed is the speed at which the motherboard will boot into the bios.
Once in the bios, you can increase the ram speed up to the speed at which the ram was sold.
Picking a XMP profile is likely the easiest way to do that.
As to the case, I see that it has a 140mm front intake fan and a 230mm side intake.
That should be plenty for a hot processor and a hot graphics card.
At least, you can try it out first.
How much height do you have for a good air cooler?
Here is the noctua cpu suitability list for your processor:
https://ncc.noctua.at/cpus/model/Intel-Core-i9-11900-1286