Go & visit home decorating stores - even if you can't afford to shop at the best stores, go there to see what it's all about. Don't slavishly follow everything, but develop your sense of what looks good.
Go to the color swatch display area of your paint store or hardware store & look through colors & color ranges, & note what you gravitate towards & that pleases you the most. You may have already been collecting pictures of the things you love for some time – what patterns have emerged for you? What story about you are your pictures & preferences showing & telling you?
Arranging your furniture becomes much easier once a focal point in your room is established. Your main furniture pieces are best directed towards your room’s focal point, keeping the major traffic areas open & easily flowing. You should aim to have a balance of furniture items around your room.