Can I use cursor keys for movement in Doom 2?

I tried all keys and found that I can move with W/A/S/D, but a few decades of using the cursor keys makes it feel unnatural, probably because I am right handed.

Is there any way to use the cursor keys for movement?

On Steam version I believe you can run setup.exe with DosBox. There you can change keys however you like. Setup.exe is able to write to the default.cfg -config file. Setup.exe cannot be ran on Windows (hence the DosBox).

If for some reason you can't do this, you can edit the default.cfg file manually. This file has all the key bindings in it. Change the key codes to better suit your preferences. There's a small catch though, the key codes are actually scan codes and are hard to translate. Here is a guide to the scan codes: https://docs.microsoft.com/en-us/previous-versions/visualstudio/visual-studio-6.0/aa299374(v=vs.60)

Your default.cfg probably looks like this:

key_right 77
key_left 75
key_up 17
key_down 31
key_strafeleft 30
key_straferight 32

Change the values to look like this:

key_right 77
key_left 75
key_up 72
key_down 80
key_strafeleft 51
key_straferight 52