rogue49

BTW, don't worry about going to the gym & comparing yourself to the bigger guys...they totally ignore you...working out is a very private thing.
And everyone has to start somewhere.

You can get a cheap bench & weights and start there.
Eat, but do it healthy.

You still have about 4 or 5 more years of growing build naturally even without weights.

But if you do weights, it doesn't really matter when you start.
However, it WILL take time,
this will not happen overnight.

Just do it for about 20-30 minutes, 2 or 3 times a week.
And in a few months, you'll gain in strength and build.

BTW, when you do the weight for gaining mass.
Do less reps, more weight.
For toning
Less weight, more reps.

Be careful,
don't push yourself, and don't compare with anyone else.
You are, what you are,
different people, have different development rates.