Mark, I have a different approach. All you need do is just start with something. It doesn't need to be the one and only idea that will make you a billionaire from the first try. It just doesn't work that way.
All you need is just to pick any of your ideas that look viable and try to think out how you could bring it into life. And actually try to do this. The probability of the failure is 95%, but you'll get the most valuable asset from this - your own experience.
You cannot learn to walk without falling down. One you've already done this in your life. You just can do it once more. Either start doing it today, or just forget about it, until you're ready to take risk, which is exactly what entrepreneurship is.
Hope that helps. If you want any particular advice or mentorship you're welcome to connect me any time. I'll do my best to help you.
And good luck, you will need it!