One of the most powerful tidbits of inspiration I’ve ever heard was, “If you think you can or you think you can’t…You’re right.”
Anyone CAN learn to send and receive code well (and fast)… if they decide they want to. This applies to plateaus as well. Your success is directly coupled to your attitude.
I was 14 years old in January 1965 when I first began the journey to pass my NOVICE license test. By April I was WN2SQJ and sending and receiving 15 WPM on a straight key. CW came easy to me. In a year I upgraded to General and had mastered 20 or so WPM. I don’t know why but code has always been easy for me. Perhaps that’s why I have trouble tying my shoelaces.