It’s one thing to search YouTube for what you want to make and learn there, it’s another to ask a master crafter to explain the process in the correct way to you.
one year of searching YouTube for various techniques and found literally everything to be affecting your learning journey in a negative way. Correcting bad habits is more difficult than you think.
So I suggest we all list the things we want to learn allowing Peter to organize a roadmap and courses for our learning for the next few years.
what do you want to learn or make? what skills are you missing? What projects you want to do and find challengiby?
Vectorized pattern making in something like Adobe Illustrator, Inkscape, or Nanocad.
Traditional wrapped briefcase handle a la Swaine Adeney Brigg
Accordion gusset briefcase