Any and all advice is welcome.
I was in a similar position last year (made a break from the electronic music industry and started again last year in orchestral writing). My approach was the following:
I had a closer look at various curriculums of music schools to categorize the topics and in what order I best approach it. It came down to to a sorted list with courses I linked to the topic:
- ear training - various apps
- melody - scoreclub memorable melodies, artofcomposing
- harmony - Piston Harmony, Aldwell Harmony books, Norman Ludwin modern harmony, Jazz theory book, Rick Beato videos
- counterpoint - scoreclub applied counterpoint
- composition and form - Alan Belkin Composition book, chaplin classical form book
- orchestration - scoreclub orchestrating the line, Norman Ludwin Orchestrating (15 lessions, focusing on the strings)
.. and of course always applying the content .. thats the tricky part if you have a fulltime job
Especially the combination of scoreclub (great way of practically teaching how to approach orchestrating the line) and Norman Ludwin (in all his books he uses score excerpts and analysis to explain his topics) has a great value
I found Mike Verta courses entertaining but the actual information (still mostly fairly general) too hidden in 4 hour videos of ranting about the modern film industry .. usually each course boiled down to only a couple of bullet points
good luck