Of course 50 is not too old as long as you have a growth mindset. But you already had a software company and it "fizzled out" and you got burned out. So more

Of course 50 is not too old as long as you have a growth mindset. But you already had a software company and it "fizzled out" and you got burned out. So more importantly, have you learned anything from that, and how will you do things differently this time? (That's a rhetorical question for you to ask yourself)