Go back to school and learn a career, you can do it at night or during the day. Some even have classes on the weekends like on Saturdays. I did it when I was alone with two small kids to support them and myself. You at least have your mother helping you by sitting for them, I had to find neighbors to help me until I made it. I also was working at a low paying job, and going to school at night. With God's help, and your cooperation, and willing to work hard, you can still make it. You are not that old, so stop wasting your life away, nobody is going to do it for you, but you yourself. Get off that pity wagon and start to face how real life is. We all have our struggles one way or another.
Lord direct this woman to what she has to do to be able to find that career she so much want. Have your perfect will be done in her life and her children, also bless her mother who is helping her, may she appreciate her and stop resenting her mother's help. No matter how hard it is right now, she is blessed to have her mother alive and helping her. In Jesus name I pray amen.