Not sure where you got your info, but I highly recommend this one http://archiveofourown.org/works/403644 for understading omegaverse aka Alpha/Beta/Omega dynamics for someone who is not so familiar with it.
And if you are looking for similar trope(s) to ABO you can try Guide/Sentinel (I am s Sci-Fi noob)
Re: Understanding ABO
And if you are looking for similar trope(s) to ABO you can try Guide/Sentinel (I am s Sci-Fi noob)