Hope i can help!
I followed the magic dosbox tutorials using the latest version of Oracle VirtualBox and windows ocr 2.5.
As it wasn’t a bootable Disk I also used the windows 95b boot disk to start the process in virtual machine.
I had all the ports disabled as per the virtual machine tute.
Had initial issues with part 1 tutorial with initial install of win95.
Had no issues with the part 2 video. I downloaded the drivers as linked in these videos.
Then I was able to easily install Diablo 1 without issues.