Start making physical objects.

By hand because you need to embrace the work of making things.

Because designing and manufacturing things requires much much more work than making it by hand. That's the paradox. Yes at some statistical scale manufacturing becomes more efficient per item but not in terms of raw input of human capital.

So stop making excuses. Stop pretending that thinking about making things is more important than actually making things and failing. A badly made thing is better than the perfect imagined thing.

Good luck.