So a common issue (for myself as well since I'm also an art collector), is knowing whether a piece will fit in a certain spot or spots in your home. Original art is a commitment of space and money, and while many artists will give you 7-14 days to decide if you love the piece, it's nice to avoid the hassle of possible returns. Walnut, a free app available through Apple by Vedran Arnotovic, lets you upload pics of your own space and pics of the art you are interested in, so you can visualize it before you buy it.
So, load up Walnut. Snap pics of the spaces you want to fill and preload them. Enjoy a lovely day at a local art fair and see what looks great for your space.
Pro tip: Get permission from the artist before snapping any photos of the art. They do hold the copyrights. If you ask nicely, they may be willing to email you a nice low rez image of their work so you can visualize it for your space.
There are other types of visualization sites and software, but they tend to be specific to that site and are more for scale as opposed to your particular space. The nice thing is, they are on the rise and take some of the guesswork out of art buying. Some examples where you can do some visualization for scale (usually with prints, but it gives you an idea): UGallery, Houzz, Saatchi, Fine Art America and even my own site shop.rebeccabangs.art
Hope this helps you find some lovely art that is the best fit for your home!