I'm  a 5' 10" ,155 lbs & 21y/o male. My family have a really bad heart and back pain history. And, recently I also started feeling back pain so bad. And also feel difficulty when I lift heavy things at work. My body is also not in shape...bank ko hakim jastai bhudi niskina lagyo :(  which is quite depressing.. I always have to wear full shirt. Im so embarrased about my body. I dont even go swimming or to the beach. So, finally I decided Im gonna work out and make some muscles. But, I dont know what to do. I came to know about YMCA which is like 500 meters from my place. They said it will cost me $50 registration fees and $39 per month. And, $99 for 3 one hour long personal training sessions. They've got everything. I can also learn swimming during summer but they will charge more for that. Fitness connection is far but might be cheaper.

 So, friends please help me on things like

- if I should start gym or not, about the cost, 

-what should I keep in mind before joining the gym, 

-other health tips like time of working out..should I eat before or after.

 I know you guys have much more knowledge on this...please help a bro out. :)