How to properly setup audirvana with Denon X1400H

Hey guys
I have a Denon X1400H connected through HDMI to the GPU, and it is also activated via UPNP on the network. I have 7.0 channel setup ( didn’t have money for a subwoofer yet)
Can you please guide me how to properly set things up.
My sources of music would be some DSF files that I have on the PC and also TIdal. the receiver is defined as a 7.1 channel home theater atmos compatible device on windows.
I also play games with dolby atmos and atmos demo files, atmos movies and netflix with ATMOS. so I don’t want to lose the atmos functionality.
Thanks in advance