Get good firearms training while you can. Start with Appleseed and then progress to others as your budget, time and skills require.
People in the US have so many great options for firearms training. Do you know if they are open to foreigners as well? One of my best friends is in the US military and he took me to a shooting range but that was about it.
I would love to get some more serious training.
Alea iacta est ("The die has been cast")