Yes, things will be explained later on, her story will be shown to you and you will be mind blown. The monogatari series is not a beginner anime series in my opinion. But yes things will clear up. The anime is about the many folk tales/myths in japan aka "Apparitions." It gets pretty interesting later on and the strange characters are fun to watch. But like I said if this is your first anime I suggest dropping it for a bit then coming back to it later.
TL;DR Yes it'll be clear in time.
and the graphics aren't too important if you are able to read them good for you but they won't add too much or take away from the series.