You should probably just google "cost of living (your city)" and find a chart that shows the low/average/high amounts of money people spend on typical living expenses like rent, utilities, transportation, food, etc

Start from there and see how much you need to earn every month after taxes. Then add 30% on top for taxes/deductions.

Then look for jobs that will be paying that amount of money that you can apply for and would be willing to hire you.