We have a full tutorial on our blog with step-by-step photos and instructions. You will "install" the stencil on your prepped surface just like a wall decal (remove the stiff backing paper, rub down the vinyl & mask, gently remove the mask). For most projects, we recommend first painting a thin layer of paint in the SAME color as your project surface after the stencil is applied to eliminate any bleeding. Allow that to dry (usually 1-2 hours is sufficient) and then apply the paint in the color you want for the design. Then we suggest waiting another 1-2 hours for that paint to set before removing the vinyl background. You have less chance of smudging your design that way.
If you are ordering more than one of the same stencil, contact us and we can talk about a quantity discount.
If you have any questions at all, just let us know. We're always happy to help in any way and look forward to discussing your project and helping you create exactly what you have in mind.