Are you in the US? I’ll assume so. The first step is that you MUST fill out a FASFA. That is the Federal Application for Student Financial Aid. One dillema with that. If you are all of a sudden estranged from your parents but under 23 or 24 I think, the FAFSA will still assume that your parents have an obligation to help with your schooling. What that means is that you will be required to use their financial information. There are ways around this if your Financial Aid counselor is willing to work with you. (There is no appeal of the counselor’s decision and it is simply luck of the draw usually.) If they (your parents) are unwilling to cooperate, you can get an overide allowing you to use your own info. I think the new form comes out in December, so you are asking at a good time! Get it the day it comes in, fill it out (it is easy, you need the tax returns from last year pretty much) and turn it back in immediately. They really push the online service. You have to get set-up with a pin number, so get on that as soon as possible. (Not sure if you can now, but if so, do it.)
The FAFSA asks if you are willing to accept grants (duh, yes), loans, parental loans, and work study (no more than 20 hours a week, you work for the school wherever they need you). Once you fill out the FAFSA, you will then use that for any other aid you apply for as well. Schools usually have their own grants and departments do as well. Then there are scholarships through local and national groups. Most scholarships go unawarded because no one applies! Don’t bank on the big ones, but go for several small ones ($500-1500). You are more likely to get those. Many require essays. Those are least likely to be applied for, so take the time to do it! Some also will pay for a specific class or for books or some such. Every bit helps.
**Also check into changing/taking on jobs in your field. Many places (I think even Sears) will pay tuition for classes in a field that will help you in your job at the company. **Some employers also have re-imbursement programs. Even a lot of fast-food type places. Look around for benefits!
Lastly, check out your local Catholic church and diocese. The more involved you are, the more community support you will receive.
PS Check out the Knights of Columbus. Insta-group of support for coming into the church community. I hear it is a good old (orthodox) time for guys. With your family not supporting you, you must realize that you will need support within the church, so seek it out.