Working to help support your family is an extracurricular.
What is your local state university? Have you run the net price calculator to see if it will be affordable?
If not, consider these lists (note: some colleges use unweighted GPAs):
http://automaticfulltuition.yolasite.com/
http://competitivefulltuition.yolasite.com/
http://nmfscholarships.yolasite.com/ (if National Merit)
Also, if you want to be a military officer (as evidenced by your ROTC interest), look into the military service academies as well.