Disappointment

So DH was kind and let me use some of the money saved up from working to buy a new digital SLR camera. I've been wanting one for a long time, and finally we had enough saved up to buy one. It came in this week, and I can't figure it out! All of the pictures I take outside end up being really washed - out, even if I have it set to a really low ISO. I know I'm not an expert, but I was hoping that I could just put things on an automatic setting and take some decent shots. But alas, that's NOT the case with this... is it me, or the camera? Is it both? Does anyone have any suggestions?

Our house: