Budgeting help?

So I work an average of 27 hours a week and my check after tax is about $255 every Monday

I put up $40-$60 a week for a car

every 26th ish of the month I give $200 towards rent on top of that

every 14th of the month I pay my phone bill $53

Groceries and what not let’s say little over $150 a month

I’ve been trying to put up $100 from each check and save up $1,000 dollars by At least January 6th how can I do it I also plan on switching my job very soon like by Christmas so that’s a little difficult in planning I have $200 saved up now not pitching into my car funds or rent

I had $1,500 saved up but my boyfriend and me ran into some money troubles at the beginning of winter and I pitched in more to make sure we didn’t lose our apartment and had food to it. I am also currently in college if that matters I spend maybe $9 on a lunch on Tuesdays and Thursdays