Its a mixed bag for me. Seen the films when I was 3 to 5, lol (that is pretty much where it all began, and for me my biggest frame of reference in how my aesthetic for Conan should be, whether it is 100% correct or wrong, the films are my main anchor growing up).
Then the Comics. Lots of them. I recall so little from them though growing up, just, images and stories here and there. Sometimes character references come to mind.
Very little from the books, some references here and there.
A lot of art based on the lore, which is just images really, but again, adds to the visual feel of what Conan should be for me.
Then there was Age of Conan, played the crap out of that and had collectors edition detailing a lot of things as maps, races, and other details that made it more consistent at last for me with everything else I knew so far.
Then a few more comics I got my hands on after so many years (none of the new ones, I found the few remaining from the classics I had).
Oh, some other side characters too which I thought were from Conan but they are actually more from the whole Hyborean time period of Howard.
And lastly, a fair bit of wiki here and there.
So, yeah, mixed bag