I personally split gamedev into 5 separate hobbies:
- conceptualizing
- 2d/3d rendering
- music
- programming
- putting it all together Then I rotate between whichever one I feel the most attracted to at the moment.
The hardest thing is to keep within your level. You're not a 1-man army who can make a Hollow Knight in a year. Start with small ideas and expand and remix them as you improve and/or find slaves. But definitely keep the big ideas somewhere bc you might accidentally make all the systems you need along the way.