The background in a photo, particularly a closeup photo, needs to be very clean and not distracting to the subject. If you can insert a handmade background behind your subject that can provide a nice clean background. Indoor photography can certainly use these backgrounds too.
To make your own backgrounds, find a hedge, wall, leaves, etc that you feel has a nice blend of colors. Then set your camera’s lens to its widest aperture. In addition,
defocus the entire scene so it becomes one nice blur of color.
I suggest printing these on matte paper to reduce any possible glare… even better is on canvas or fabric.