The old dream of going back in time and giving your younger self advice is a wish many of us have.
The draft ended 10 days before I was to be drafted. I regret never having served in the military. I would urge my younger self to change that.
Of course the advice about buying stocks of Microsoft or Apple would be high on the list.
Overall since I can't go back and give myself advise I think I figured out a decent path. I have never even once had handcuffs on, never arrested, no jail time.
I have wonderful lovely wife, zero debt, a nice safe home with a three car garage and my garage is a dream garage with a scissor lift, heat, ac, a fridge, space to do an engine swap on a car and most important an bathroom in the garage. The house even has a kitchen and a bedroom. The wife insisted on that.