WaterBomb, I'm assuming AK = Avatar Korra and Ree = Lee? Anyways, I looked at AK's work out post and (no disrespect intended) I'm no sure how valid it is. Some of the things she wrote in it are against what I've been taught (not eating too much, or else you get overweight, also don't rely too much on gym and instead focus on pushups, sit ups, pull ups, etc) Again no disrespect intended however can a guy check that post and tell me if it's accurate? A girl might have different idea of working out and I want to make sure I'm not following some woman's work out guide. Also, that philosophy isn't really true. I could care less about how my body looks, however no girl thinks that so I have to change myself. Sports and physical activity aren't my favorite thing and if i could have it my way I'd never work out.
I assure you it's okay, I'm not a guy but I still understand how muscles/exercising works haha. Hmm not sure where you heard not to eat a lot, since it seems you want to bulk up and get more muscular eating a lot of the right food is CRITICAL. Eating a lot doesn't necessarily mean stuffing your face with big macs and twinkies you know :p
Eating lots of protein-enriched foods is key, lean meats, fish, steak, etc. is good for you and tastes good!
It's true you don't have to go to the gym, but it sure would make getting bigger easier! If you don't want to go to the gym, body-weight exercises are your friend. Here are some exercises off the top of my head. I'll type up a longer, in-depth post later
Lunges and Step-ups for your legs, Push-ups for your chest, Bench-Dips for your triceps, pull-ups and chin-ups for your back. There are also a million different body weight exercises for your abs such as Russian twists, crunches, planks, and V-ups.