I have made progress. I managed to get Kali Linux to work on Virtualbox and proceeded to use hashcat to begin the process.
Unfortunately after getting everything set up it seemed that the hash was too large for hashcat to deal with. Either I find a way to reduce its size or I will have to try again with JTR which was being a bit more dificult for me to get to work. This has been an interesting learning process. And I appreciate all the advice I can get.
I hope I can do it, and of course thank you for helping me.
I'll keep trying.