As you can see everyone who has ever learned morse, or failed to learn it, has advice on how to do it, and usually also has advice on what not to do.
I have coached many morse students since getting my own licence in 1965. The main thing I observe is that students are keen to get right into sending too early, so they learn to send morse that does not have correct spacing, either inside each letter, between letters, or between words. It can be difficult to unlearn bad habits. The most common mistake is to fail to learn the rhythms of each letter, then to speed up before the sound is correct. The most common sending error is short dashes - ie. Failing to send long enough dashes. Only an experienced ear can help you correct that. The 3:1 ratio has a distinct sound.
For learning the code, my brother Roger (VK1RD at the time) developed a training method that he distributed on cassettes, the technology of the 70s. Many operators have told me how successful they were at learning from those tapes. The basic approach was what he called “the sound-only method” which meant learning the code by learning the sound of each letter, rather than reading dots and dashes printed on paper. His teaching method was to divide the alphabet into groups of 6 or 7 letters (A-G, H-M, N-S, T-Z), and provide a tuition phase and a randomised recognition phase.
These days there are so many methods and so many software options available.
You will hear conflicting advice on what is the best method. Many people have been successful with different methods, from which you can only conclude that the “best” method for each person may be different from the “best” method for others. Everyone’s brain is different, everyone’s learning challenges are different.
However, what is clear from every successful student was that they got nowhere near using morse on the air until they knew all the letters of the alphabet and could instantly recognise each of them when the letter was heard as a keyed tone. That’s how morse comes to your ear off air, so that’s what should be practiced.
After learning the entire code and getting some sending tuition, you need to start with easy QSOs with a buddy on a band (no QRM), maybe VHF. This will help you gain confidence for HF SOTA use. It is easy to become flustered at first. You are training your brain to do something new, like learning a new language. Use a cheat sheet printed with the essentials of a contact - his callsign DE your callsign, RST 599, Op John 73 BK R TU. With those letters in front of you, you won’t forget what letters to send and you won’t get flustered so often. If you fall off the bike, get back on.
With an appropriate method you won’t need luck, just some time and the urge to be successful at a new skill. But good luck…