Just my two cents.
No, no, much much more than two cents' worth!
kappie7
Fimbul has given you absolutely brilliant advice. Following it will set you on the path to success (no guarantees that you'll get to your goal, though!), while not using it to make your roadmap will see you lost, wandering and distressed, in the wilderness of Unfinished Projects.
Have you got Scott Rogers' Level Up! ? That will give you more detailed practical guidance on each of Fimbul's points. See, for example, his 'Level 4: You can design a game, but can you do the paperwork?.
Best wishes!