As someone mentioned, move one of your ram sticks over a slot, you always want to skip a slot unless you fill them up.
For keyboard and mouse I’d say make sure you plug into the motherboard directly so that you’re not dealing with issues with the case USB ports while troubleshooting
Look for error LED, should tell you what’s wrong
Reseat everything
Just used this bypass 2 days ago. I’d recommend people download the current W11 installer so that the work around always works as long as you keep the device away from Internet until the OS is installed