Fitness for life

I am 43kg...Small build.. But I've been thinking. Am i fit to go to gym? Anyway. Gym is for everyone right?
So this is all about am i fit in or not.
Well,don't assume a small body like mine is healthy enough. Yea, physically look like,yea maybe. but inside.. we don't know.
There's a lot of research being done. i don't mention it here. But, a small body with a wild appetite like me. more likely will had higher cholesterol than the other.

. Today i burn out 120 calories. it is the same amount , 1/3 out of standard size of a burger.
. Ya it is.
It's freak me out. haha!
But guys. Before it's too late. better go for a work out. Put away all the negativity. Saying that"ohhh your body fit what. You are good enough what. no need gym la. go eat a lot already" haha I've heard this a lot. but guys. don't listen to those. You are yours. You know your body. your health. You know your inner potential. Don't be comfortable with your living today. Coz today is today. tomorrow and future?
We don't know right? so...what you waiting for?
Come on!!!