Congratulations on your first home! That is very exciting. And, I know, overwhelming, too. My general advice is this: take your time. I know the tendency is to decorate and fill your house as soon as possible, but try to be patient and pick things that you really like vs. things you need to fill the empty spaces. And, if you have to paint, I recommend painting all the walls in light, neutral colors that will go with everything you have. As you start acquiring new pieces and rugs and art - really pulling the rooms together - you can pick new wall colors from there, if you want.