Need help.. And some friends

Hello, I am 25 years old, had a child six years ago. I'm 5'7 and about 238lbs. Not very active. Working full time overnight, and I will be in school next week working full time as well. I am always tired. And have became very lazy over the years. I have been gaining 10lbs a year. I have no idea why or how. Any suggestions or advise will be very helpful. New friends will be great also. ???? b