Hi Desiree,
If you choose to keep on trying outdoors with busy background, then here is what I would suggest: 1) use a wide poster board to block the background and/or 2) increase the depth of field on your camera (unless you have point-and-shoot, check the manual for micro photography settings) so that the background begins to blur, while your subject/object stands out. The depth of field is something that will allow you to increase the perceived distance between your object and the background, which will naturally make the background blur (the farther the background the less defined it becomes).
Also keep in mind that a busy beckground is not necessarily the one that has many different objects in it -- it is anything that creates a well-defined image in itself which then begins to compete with the focal point of your photo. For example, if I can see the little cracks and lines in the concrete surface you are shooting on, then it is a busy background, if I cannot and the texture of the concrete begins to blur, then it is less busy and less intrussive.The same goes for leaves or forest, etc. If this is a challenge, then try shooting on a posterboard of one color propped against another poster board in an "L" sort of manner.
Trying different things will show you what results you can achieve and that way you will see what you need to tweak based on what you see and what you like :)