I live in the state you aretalking about. There is help for you, but thereyou have to be focused and determined to get it. True, because you are under the age of 22 and living with your mother you cannot apply for assistance for yourself. Your mother has to do this for you. Since it seems like she is incapable of doing that, here are some things you can do:
1) Go to the Workforce One Unemployment Agency closest to. Inquire about the WIA program. http://www.floridajobs.org/workforce/WIA_QA_Answers.html#WhoIsElig
This program will you to put your children in daycare while you go to school/look for work.The puropse of this program is for helping people get the neccesary schooling and/or training to become employed. They pay for tuition and books, and will give you a monthly gas card or bus pass. They will assist with day care.
2) Apply for Grants -While you are in school you may be eligible for the pellgrants (www.fasfa.ed.gov) and scholarships (www.fastweb.com). You can also apply for work study, wher you can work around you class schedule.This will be the income u need to get on your feet.
3) Apply for public housing (http://www.phada.org/ha_list.php). For some reason it's easier to get on the list in N. FL than S. FL. There will be waiting lists. Once you get your own place you will be able to apply for assistance for you and your children. Also, contact your city's housing department. They nmay have a list of "TAX CREDIT" apartments in your area. Ownwers of these apartments get tax credit for redcing their rent for low income families.
4) Remeber this, once you get the ball rolling, and you start showing that you are trying to help yorself, - the resources will come. You have to ask a lot of questions, don't take NO as a final answer, be determind, and think outside of the box. Know that as long as you are trying to to right by you and "your kids," there will always be away.
5) Survival - Now that you realize that it is hard being a single mother of 3, don't contribute to your own downfall. Love your children enough to want to do right by them, and give them the foundation you didn't have. Not trrying to tell you how to live, but I would think twice before having a fourth. Playing the single mom card will play out soon enough, and things will get harder. Trust me, I know and I only have 2.
6) And I know you have those kids' fathers on child support! Giiirrrl..... if you don't I know somethin'