Even small shrubs tend to be 3-4' wide and/or tall. Remember, though, that all plants will be small when you first buy them. Pay attention to the expected mature height/width, and avoid planting them too close to a wall, fence or pathway. For instance, if a plant is expected to eventually be 4' wide don't plant it closer than 2' to a pathway to avoid tripping someone. It's better to fill in with annuals and perennials until the shrubs grow some.

I looked up the climate for Reno, and see that your summers are dry. Any new plants will need to be watered the first year, and require supplemental irrigation thereafter as your annual rainfall is 2.35". Because of your climate I think it best for you to visit local nurseries where the people know what will work. Consider shrubs native to your area.

I recall spirea, and are many kinds.

Tiny pink flowers appear on 3" wide corymbs. Deadhead spent blooms to encourage rebloom.

--------- "Deciduous plants, or plants that lose their leaves in the fall, are good firescape choices. Most evergreens are not. This is because they contain flammable oils..."

https://www.unr.edu/nevada-today/news/2019/atp-firescaping

I am a Master Gardener living in Sparks. Contact the county extension agency for resources and information on plants and shrubs that work in our dry climate. It's a free service and people there love to help. One thing I learned is that our unique natural light as the sun rises and sets washs out many of the pastel and white colors. I had to replant my front flower bed as the original blooms didn't show up well.

Thank you for tour help!