To get a government student load based off your income you need to fill out the FAFSA form every year you are in school. Your government sponsored grants and load amount will be based upon the income of our parents, the number of siblings you have, etc. Here is a link to apply: https://fafsa.ed.gov/ I recommend taking the subsidized load over the un-subsidized loan, as it'll have a lower interest rate. I do not reccomend getting private loans, as they'll be a lopt more expensive to pay back in the future unless you really need to.
Also look for scholarships within your high school as well.Talk to the counselor and see if you qualify or can apply to any scholarships locally.
Also depending on the university you apply to, they'll automatically offer you a scholarship depending on your class ranking and grades. Also if you are applying for an out of state university and they really want you, you can possibly receive in-state scholarship, which pretty much means you don't have to pay tuition as an out of state student, which saves a lot of money. But if you are strapped for cash, you can apply to work studies that will give you some cash during the school year or help pay off some of your tuition.
Let me know if any more help is needed. Be glad to help.