I learned Morse Code as part of my post boot camp training in the Navy. We where thought to copy via a typewriter. After a week or so of 3-4 hours a day listening to code and typing out each character it became so easy you didn't even think about the dits and dahs, you just heard a string and knew what the letter was and your typing finger automatically pressed the correct key. I found it helpful to associate some phrases with the sound of most of the letters. For example L is Dit Dah Dit Dit which I associated with "the hell with it" and F is Dit Dit Dah Dit, which sounded to me like woody woodpecker and Q is Dah Dah Dit Dah which sounds like "here comes the bride"

Today, some 60 years later I still recognize most of it if it's not too fast and I'm sure a few days of practice and I'd be right up to speed. Most people find it easier to send than copy code, but sending good code takes a lot of practice as well. You might think your sent code is good, but spacing of characters and words is critical.The newer keyers like the iambic really enhances to quality of sent code but you need to learn on a straight keyer first.

Good luck with that. It's a fun project if you've got the time to invest.

I was in communications in the army. We did a LOT of Morse code commo due to jamming by those "nice folks" just across the border in East Germany.

We did all the copying with pencils, at speeds up to 25 words per minute. Most of what we communicated was in code, 5 character groups as I recall.

I was taught in Scouts, the Navy and when I worked toward my Ham license. Years later, it is as foggy as my Betamax.