Baking soda and vinegar will be your friends, esp on a budget. I’d heavily invest in purchasing a couple of spray bottles. OP, don’t give up!

It’ll be a long process getting everything to a “normal”, but I have faith in you.

As a person who suffers from depression and anxiety, sometimes I get overly anxious about cleaning, so I can sympathize with this. I’d suggest reaching out to a family member/friend you trust and talking about this. Getting the work done is one thing, but it would help if someone outside of your home knew you were having trouble with this and could keep you accountable on your cleaning goals for the future.