Where can i go thats a cheap GYM?!!

So i need to workout ASAP!! My body has been shutting down getting all these health issues. And im scared I started getting fat since 2020 when i had my 1st baby… now im 166 pounds. I dont want any health problems.,, 😢i have my babies to look after. Im a single mom.. im just so fat… i got really fat on my thighs and arms and stomach..