[NoMAD76]

I might repeat what others said but since it's a "huge hobby project":

1) Break it into smaller chunks

2) Prioritize all those smaller chunks by impact, difficulty, and dependency

3) Break them again into smaller pieces based only on difficulty

4) Work based on priorities, get lower diff and high impact first

This way you will start to get a good feeling about your work/project.

Take breaks and make sure you don't burnout.

Good luck!