The "practice, practice, practice" is what is needed after
you find the correct arm, hand and wrist position, the contact spacing on the key and the spring tension. Problems that also might need attention is key "skating" on the desktop and probably a half dozen other things that might crop up.
Sending and receiving Morse code is a learned ability just like playing a musical instrument. Mastering either provides beautiful music, depending on the ear of the beholder!