It’s actually quite simple. I always thought it was difficult and you’d have to learn from a code sheet, but I found an app which teaches you and you actually just recognise the sounds like you’d recognise any other sound. You generally don’t even need to decode it- you just get used to what a letter sounds like. I’ve been learning since Saturday and can already key my name out.
I was playing this game with my friend called Keep Talking and Nobody Explodes, where basically a bunch of us have to solve a bunch of mini puzzles in time. One of us has to convey what the puzzle is, while the rest of the team has to decipher and solve the puzzle without looking at the screen. One of them is straight up just decoding morse code from a blinking light. I felt the need to learn morse code then but we’ve stopped playing the game.