OpenCog is an open source AGI project. But it is is also incredibly complex and IMHO not a good idea (I have not fully read his theories). You can learn the essential ideas behind OpenCog from the co-founder Ben Goertzel site as well.
Or, you can participate in the philosophical discussion regarding AGI. For strictly AGI / decision theory / logic / math material (they are all related), you can look up stuff from http://yudkowsky.net/ or https://arbital.com/. But in some sense every branch of philosophical inquiry can be tied back to AGI and consciousness (ethics, metaphysics........) so if it fancys you it depends on how you'd like to tackle it.
Or, you could study the psychology end of things. These papers / ideas are quite important in the field of study of consciousness / cognition (but keep in mind this is pretty much a random list, the literature is massive!):
Free Energy Principle
Global Workspace theory of consciousness
Recently (in mathematical time), progress in category theory shows promise of being a unified framework of much of the existing math. I know next to nothing about it, but the people that do are applying to many new fields of study (including AI apparently). Category theory requires a lot of background mathematical knowledge before its vocabulary begins to make sense though so beware. You can read about it on the nCatLab and occasionally on John Baez's blog: Azimuth