In some states, you can not receive food stamps if you use Fin Aid (Pell Grants, Student Loans, even Voc Rehab, WIA, etc...) to go to school -- they count your Fin Aid as income... despite the fact that it is used for tuition
Likewise, some other states specifically exclude the portion of Fin Aid that is used to pay directly for school costs (tuition, fees, etc)
So, check with your state to find out if college students who use Fin Aid to pay for classes are allowed to be on food stamps ---- I would encourage you to at least apply for Food Stamps & find out
Same thing with SSI.... apply & see
Have you tried Voc Rehab to help with school?