How to dig out of this hole?

I'm struggling to see how I can dig myself out of this financial mess of mine.

I have my monthly budget broken down below:

Income: $4161

Rent: $2200

Car: $665

Insurance: $450

Consumer proposal payment: $300

Utilities: $200

Phone: $95

Gas: $200

Grocery: $34

Bank Account Fee $17

I live in rural Ontario, hence the need for a car. My car is only so expensive because my ex wife used to pay for it (it's a long story but I have to pay for it now as its in my name and car has significant negative equity, so if I sell it I owe $18k.

My savings have all gone to my ex. Someone I have no room to save for last months down for a new rental, and all rentals here are around that price I have a 2 bed 1 bath since I have a young child split custody. I will look into getting CCB split with ex.

I have tried to renegotiate auto loan to no avail due to my poor credit from consumer proposal. I use a food bank because I can't get by on $34 a month in groceries/toiletries.

I feel stuck. I work 8 to 5pm with hour long commutes and I am exhausted. Ex pays for daycare. I habe a special needs child I have to wait 2 years for autism diagnosis.

Advice?