You would answer 1 family member in college (which is you).
If your EFC is $0, then in addition to Federal Pell Grant which is the maximum amount for the year, you would be eligible for a Cal grant that should cover UC tuition.
There is also the MIddle Class Scholarship:
Here is an example of a UC Financial package with an EFC of $0 but please run the Net Price Calculators for all the UC’s since the packages can vary.
Cost of Attendance: $35,178
Expected Family Contribution: $0
Need: $35,178
Financial Aid Package
Cal Grant A: $12,570
Federal Pell Grant: $6,200
Federal Direct Subsidized Loan$3,500
University Student Loan: $2,000
Student’s Self-Help $2,500 (Work Study)
University Grant: $6,122
Waived Health Insurance: $2,286
Total Financial Aid Package=$35,178
Realize that you will probably need to take out the Federal Student loans and contribute to your college expenses by doing work study.