Welcome!! Look forward to your contributions here. I think many can relate to what you are dealing with. The reality is we have had real passions and dreams taken from us and replaced with an imaginary panda petting paradise. The good news is that you are still young and you have not only a chance to make a great future for yourself and your wife but also an opportunity to give your kids the kind of upbringing you didn't have!!! It's ok not to know who you are or what you want to do. Hell, I'm still not sure and I'm in my mid-40s!!!
You are right, you can't get back that child like imagination about what you want to do. But that doesn't mean that you can't see the world through your kids eyes at least a little. To me, that's the coolest thing about having kids. You sometimes get to experience their imagination vicariously. My kids have tons of opportunities that I never got and I love to see them play sports and do other activities that I was never allowed to do.
Looking forward to hearing more from you. Love the opening story by the way!