First paycheck, pay off friend..
Next, your paid for living accommodation is worth up to $1000 per month in normal working salary. So pretend that you are bringing home $2100 x 4.1 weeks / 1.25 (taxes)+ $1000 per month.
That is about $7900 per month.
Now what saving percentage do to want to see? Do you need to save to tide yourself over for a year without work when this runs out?
I recommend thinking about all you want to pay for including:
Health insurance
Parents
Saving for long term personal use items ( a few good clothes, PC).
Saving for a gap year of minimum wage in future.
Student loans.
Retirement.
If this were me, I would :
Put the car into storage for 10 months. I assume this is a vehicle worth less than $8000.
Talk to parents and let them know you will pay in full when the family business is sold. Or pay them back at $2000 per month. They know best about the business, I presume, so may accept that.
Put rest of business money into retirement acct. When you get it, Or roth style acct, but No touching.
Save 70% of take home ($4800)
Use that 70% to save for courses, living expenses after. Retirement at only $500 per month.
Use 30% $2100, for my monthly use, clothing, car payment, PC saving at $300 per month, student loan minimums( no defferal! And I assume very low interest here, to justify delaying full repayment). Check out a lot of funky thrift stores for clothes. The more you look , the better clothes you find.
Kill all monthly costs. Be ruthless. Keep a very low costphone, basic internet or free WiFi for pc only. Kill car payment by selling car if you could trade down to a $6000 car later and pull money out now for your courses and PC withimn the year. You will not want a car payment when this is over in 10 months. You will want to build your skills, network and resume to help get that next employment. Set a strong goal to this end. This includes the ability to not work for several month while you agressively pursue new work in your field. Everything you do in the next 10 months should target helping or at least not impeding that goal.
But...
Have fun, you decide how to spend your 30%. It really doesn't matter if you eat out or buy more clothes new, or keep fancy internet, if you keep to 30% of your salary.
Killing car payment and paying parents will give you a lot more freedom
Good luck!