@hannah Small's not a problem. Small can be an advantage. When I was in grad school doing this I was like 5'4" and that means you can get your hands and body into places dudes - particularly big dudes - can't.
But yeah, you'd need to build some muscle. Not crazy amounts, but some. Enough to pull and haul wire.
(I had a big growth spurt after, ended up over 5'7", still don't know what's up with that.)