Not hard to do really, not sure if there is a guide out there.
Basically turn off the computer and put the plug from the wall.
Ground your hands on the metal case or the PSU before you touch the drive and MB.
Install the Nvme card in the slot you want to use, there are two slots for that card.
As said, make sure it is the only hard drive in the system when installing Windows.
Make sure you turn on the slot you want to use in the BIOS. Advanced menu, select, onboard device configuration and turn the slot on. Page 34,35,36,54,55,56 of your MB's manual give pretty good instructions on how to install the drive.
Also this was in the manual. Page 56 has Set “Launch Storage OpROM Policy” to “UEFI”. Then set “Launch CSM” to “Disable”. Here is a link to the manual.
https://www.evga.com/support/manuals/files/131-CL-E499-KR.pdf "M.2 Lane Distribution M.2 Key-M (110mm, Top, PM1) – x4 from Z490 PCH o M.2 Enable/Disable is set within the BIOS o This M.2 Key-M slot shares lanes with the U.2 port. Installing an M.2 device will disable U.2 port PU1. M.2 Key-M (110mm, Bottom, PM2) – x4 from Z490 PCH o M.2 Enable/Disable is set within the BIOS o This M.2 Key-M slot shares lanes with PE3. Installing an M.2 device will disable PCIe slot PE3.
M.2 Key-E (32mm) – x1 from Z490 PCH o M.2 Enable/Disable is set within the BIOS U.2 Lane Distribution
U.2 (PU1) – x4 from Z490 PCH o U.2 Enable/Disable is set within the BIOS o This U.2 port shares lanes with the M.2 Key-M slot PM1. Installing a U.2 device will disable PM1."