That's the spirit buddy!
Keep that dream, I've had the same one since I was your age and I'm getting to the point where I'm almost ready to get my own set of armor.
Ask your parents if they'd help you make some armor out of foam like mentioned earlier. I'm sure they'd love to help you and spend some quality time. Then when you get older you can save up for a really nice set and join the 501st.
I hope you figure something out! Keep us posted on what you decide to get/do and how it turns out!