If you don't know about the SCP wiki, I really recommend checking it out, but be aware that it can be a really deep rabbit hole. The most important articles are the SCPs like this one, basically anomalous objects or beings. But often much more interesting are the tales, which are storys about the SCP foundation and everything else in the fictional universe.
And if you are confused: There is no shared canon, so articles can contradict each other (and they often do).
And if you are confused: There is no shared canon, so articles can contradict each other (and they often do).