A question regarding Buddhist world view and sense organs and their objects

I have recently started reading about Buddhism and I wonder what the world view of Buddhism is -- is it the world view that there is not one world as we think, and instead we each have our own world? When it is said in Buddhism, let's say the sense organ of the eye and its sense object: does the "sense object" here refer to the *object* seen (for instance a *chair* that is seen), or is what is meant with "sense object" the *picture* that I see? Same with tactile objects: is it for instance the *bed* I am laying on, or is it the *sensation* of touching the bed? Also one question that I have regarding the sense organ of mind. It is said that the "external" sense object of mind is thoughts -- how can they be external if thoughts is happening inside the mind, or am I missing something? The view of 6 sense organs and 6 sense objects: is it meaning that there is nothing outside them, in other words there is only our experience not a world outside?