At 140lbs don't worry too much about bodybuilding, you won't pop out during the night, it's a long process.
Calculate your tdee, stay in a caloric sulprus, if you won't eat enough you won't grow.
Pick up beginner program, like fbw that contains basic compound lifts, you want to learn how to bench press and squat. I'd say fbw is the way to go at the beginning, so you can learn patterns and lifts. Sticking to a routine is simple but mandatory, dont do random shit at the gym.
Eating eggs in the morning is fine, now add chicken with rice for lunch and dinner for the rest of your life and you are good.