how do we learn about God/Christ apart from Scripture?
The same way as did those before there WAS “scripture”... or before there were gospels... or a revelation... or the Bible canonization, dear godrulz (again, peace to you)? Or, absent that, at a minimum, by following what [the scriptures] SAY about that subject? I mean, we DO have what Christ is recorded to have said, as well as what John, among others, do we not?
“… the helper, the holy spirit, which the Father will send in my name, that will teach YOU all things and bring back to YOUR minds all the things I told YOU.” John 14:26
“When the helper arrives that I will send YOU from the Father, the spirit of the truth, which proceeds from the Father, it will bear witness about me;”John 15:26
“These things I write YOU about those who are trying to mislead YOU. And as for YOU, the anointing that YOU received from him remains in YOU, and YOU do not need anyone to be teaching YOU; but, as the anointing from him is teaching YOU about all things, and is true and is no lie, and just as it has taught YOU, remain in union with him. So now, little children, remain in union with him, that when he is made manifest we may have freeness of speech and not be shamed away from him at his presence.” 1 John 2:26-28
My sheep listen to my voice, and I know them, and they follow me. John 10:27
Following these actually works quite well, in my experience. Besides, in light of the "false stylus of the secretaries" (Jeremiah 8:8), the danger actually lies WITHIN the "parameters of [what many believe to be] the Scriptures." Christ alluded to this when he condemned the works of the scribes ALONG with that of the Pharisees. It is why he said what is recorded at John 5:39, 40:
“Y OU are searching the Scriptures, because YOU think that by means of them YOU will have everlasting life; and these are the very ones that bear witness about me. And yet YOU do not want to come to me that YOU may have life."
Thus, ALL of the divisions among "christians" have existed since the start of the great apostasy because of this: following the works of the scribes and Pharisees... as manifested either in the Bible... or their translations/intepretations of it... rather than following Christ. And NOTHING/NO ONE else. That's where the apostasy CAME from: folks following the thing that speaks ABOUT God and Christ, often erroneously so... and those who CLAIM to "know" him, by means OF it... rather than following God... THROUGH Christ... by following Christ.
Not rocket science, dear one. Quite elementary, actually.
I hope this helps and, again, peace to you!
YOUR servant and a slave of Christ,
SA