As soon as Y is introduced after lesson 19 I floundered, started getting F L and Y confused and introduced thinking delays
Mixing letters is quite normal at first f & l y & q.
Not to mention s h 5.
Practice makes perfect where you are - then progress.
At mid point I seem to struggle with the new sounds and it takes too long to recall and write down.
Lesson 1 to 10 are easy and I have no problem with them.
Typically I learn a character a day.
I would say a character a day for almost three weeks probably isn't giving you each character enough times for it to become firmly established.
You are working towards :-
hear code -> letter pops into you head automajically - no thinking about it
You learn this by a process of:-
hear letter -> think of character -> repeat repeat repeat until it happens automatically
No short cuts - the time taken is based on:-
your aptitude - is your hearing up to it ?
how much time you can spend listening AND decoding - it's possible to overdo it, lots of 5-15 min shorter sessions with recovery gaps between
your attitude - smile makes you happy, not the other way round
- how relaxed you are - tense means the fight or flee decision, not let's all learn morse then
- are you really thinking about something else instead - the leaky roof - that arse-hole guy at work - am I just too old ( no you aren't )
- are you expecting this to take a week or so - else you will get bored or start wondering if you are doing it wrong etc - or the tense starts again from two lines above
part hearing - make sure you aren't using an audio Hz at which your ears don't work as well
part how well you fix the list above.
Possible premium problem of the week this week is - - - having too high an expectation ( maybe having read the Koch reports about 13 wpm in a day), and getting downhearted when it somehow doesn't work like that.
Probably possible premium problem of the week all year . . .
There are lots of tips.
A good one is - listen to lots of morse without testing your speed or writing down. You can sort out a good audio HZ and pick out the chars you know.
You can generate some mp3 files for the lesson you are on - 19 for you by the sound of it - and listen on your phone headphones on the train.
You joined lcwo 10 years ago, so we know you aren't going to give up. You just need to know that you are normal and this takes some time and effort.
Looking ahead - you probably will be aiming to read morse just in your head rather than having to write it down.
( Getting type bound and needing a keyboard is even worse - this arises by forming a link between morse -> keyboard key rather than letter pops into your head automajically )
For this to come about you need to be decoding the previous char and remembering it with the ones before that whilst listening to the current one.
You really need to make sure that you have the chars very well practiced and well sunk in and the reflex working as well as you can. Hum them to yourself when you are on the escalator etc.
The WWII Bletchley crew went round mouth-morsing to themselves and each other all day when they were learning.
Every sign you pass, every advert is a practice second. Try every car number plate as you walk along.
As ever YMMV.
You have to look at all the hints etc decide what works for you. Everyone is somehow different. We can only report the most common issues . . .
Let us know how you are getting on.
There are quite a few other enthusiasts on this forum at the moment
and the new year's resolutionists and covid winter hobbyistst are about to pitch in . . .