Wait until you actually get the green card.
Don’t leave the US without permission until you get the green card. Don’t work under the table.
Live with your wife at her parents if possible to save money. Pay them back in non monetary ways by fixing up things around the house, yardwork etc.
Once you have the green card, get a job. Save money.
Once the time has passed to be considered an instate resident for tuition purposes, and you are accepted at a school, you and your wife can live together in the college town. She can work full-time and you can work on weekends and in the summer.
Read these instructions carefully. It says an emancipated person has to have lived in Massachusetts for 12 months while being a non-student, or be married to a Mass resident who has lived there for 12 months for non student purposes
https://www.uml.edu/docs/Residency%20Reclassification%20Work%20Sheet%20-%20April%202016_tcm18-236980.pdf
It is not simply “get married”, “get a green card”, “borrow loans”, and “finish degree”.
And once you get your green card, make sure you always notify them of your address changes.