Budgeting tips when income drops after 18 years as a store manager

My income is now a fraction of what it was as a store manager and I am trying to cover the essentials. Thank you in advance. The rent is fixed and the car payment is high. What helped you?

Check for energy assistance programmes. I got a credit that covered two bills.

Sell things you do not use. I made about $600 from a weekend of listing.