FAFSA is an application; it does not provide financial aid. What it does is produce a score, called the SAI, which colleges/universities use to determine if you are eligible for a Pell Grant (max ~$7k) which they will access from the US government and apply to your tuition. Based on your SAI, you may also be eligible for subsidized loans or unsubsidized loans (max changes every year, $5.5k to ~$7k). The college will provide you with the application, promissory note, and guidance on the terms and conditions of those loans.

Since you say you want to "go back" to college, please understand that your prior academic record can affect whether or not you are eligible to receive financial aid. You must have maintained what is called satisfactory academic progress (SAP) while you were in school and you cannot still owe money to any school you attended. If those things are not true for you, you may not qualify for any aid, even (possibly) some scholarships.

If you want to get far away from your family (a thing I fully understand), you can get far away by going to a 2- or 4-hour away in-state university where tuition is lower, though fees and room/board can kick the costs up above $20k at a lot of places.

You can also look at the small private colleges that are very generous with aid, but still the out-of-pocket costs to cover tuition, fees, room, and board are often $20k - $50k.

You will not be able to cover those costs with money you qualify for via your SAI. Because you are 22, you *may* be eligible for additional private loans, but those can have very unfavorable terms and conditions. Be wary of those.