[ystad]

Good luck. Enjoy the process.

Would recommend reading Jordan Mechner's Journal on the Making of Prince of Persia

https://jordanmechner.com/store/the-making-of-prince-of-pers...

[ystad]

I'm my opinion - 18 months may not cut it. I would consider 3 years, You need thinking time to develop your idea, games, time for pivoting.

You will have roadblocks, but enjoy the journey. There are many creative ways to sustain, write about your progress.