Starlight was recently asking about this as well and got lots of good suggestions.
I went thru a similar financial patch decades ago as a single Mom and learning budgeting and debt payoff skills was really helpful then and stuck with me. I found lots of helpful suggestions from Dave Ramsey.
This book may be of interest, or his website…
Dave Ramsey
Financial Peace Revisited: New Chapters on Marriage, Singles, Kids and Families