Christians: were adam and eve here with the dinosaurs and also?

doesnt tht mean that there was incest to ccreate the population. im confused as to how 2 ppl could make a world full of ppl. and also confused that that would mean incest went down if adam and even were the only ones producing. N the dinos were here for a while too im really confused about the timing...and the logic of thisl PLEASE A BE REPSECT FULL im really confused. i been trying to understand a few things about Christianity.