You really ought to incorporate resistance training, specifically using weights
It will likely be quite similar to what your brother does, though you needn't worry about experiencing the same physiological response he does... you won't gain nearly as much muscle mass as him for one very simple reason, which is that as a woman, your hormonal profile is fundamentally different
Ideally, you should focus on the larger muscle groups first—things like your chest, back, and legs—before moving on to smaller areas such as your shoulders, arms, and calves
By the way, trying to explain all of this through a single message feels a bit excessive, if I'm being honest
You would be well-served to look up some bodybuilding exercise descriptions online
http://www.exrx.net/And perhaps you could also take a look at
http://forum.bodybuilding.com and check out their F.A.Q. section
In most cases, you can certainly improvise an entire routine right at home, but these resources are perfectly fine for getting started... once you have had a chance to read through everything, please feel free to reach out if any part of it remains unclear