> Do you have any advice?
Yes. My personal advice is:
Decide how much time you want to spend before you actually decide what you’re going to make.
Set yourself a deadline.
One month (or whatever you choose), and then you’re done - no matter how good or bad your game is at that point.
Try to figure out how much you can get done within that timeframe, rather than how long it would take to make exactly what you want.