One of the problems if you are starting off (I'm not suggesting you are!), if you are older is you loose the ability to move your fingers quickly. I started to learn to play a penny whistle in Ireland in my 50's and really couldn't manage to play faster reels and jigs. My fingers just wouldn't go fast enough even though I practiced a lot and for a few years.! I think every commercial & military operator I met was taught first to write things down, and in capital letters. Everyone I knew could easily do this at 25wpm and clear enough so other people could read it. Clearly important if these were coded groups and some body else had to decrypt them!! But of course most of us were in our late teens or very early twenties. I can still just about manage to write at 30wpm and probably quite scruffy writing at anything faster. With a gap of 50 years between picking up a morse key again, when i became a ham, I can no longer send at 25wpm + on a straight key. I can only just manage 20wpm at a short sprint!!! Its a bummer getting older!