To get the government loan you simply fill out a FAFSA. You can apply online
here. Unless they've changed the system (it's been five years since I've dealt with applying for financial aid), all you have to do is fill out the FAFSA and the colleges you apply to will send you a financial aid package based on it. The FAFSA covers all federal financial aid (grants and work-study as well as loans) and many colleges use it to determine students' eligibility for financial aid offered directly by the college.
Keep in mind that income is a consideration--federal student aid is designed to help low-income students; the more money the student and his or her parents make or have in the bank, the less aid they're likely to be approved for.
The 8% sounds a bit high, but the rate charged is always based on prime rate. Have rates gone up recently?