Reddit mentions of The Ultimate Garden Designer

A destination and a way to get there is kind of the definition of landscape design.

This is a good beginner book which may inspire you:https://www.amazon.com/Ultimate-Garden-Designer-Tim-Newbury/dp/0600619877.

It may be at your local library or you can buy it used on Amazon.

If you're just looking for planting plans for the edges of your garden, Lowes has several predesigned beds illustrated on Pinterest.

Here's one for privacy:https://www.lowes.com/creative-ideas/lawn-and-garden/evergreen-screen-landscape-plan/article

Here's one for a drought resistant planting:https://www.lowes.com/creative-ideas/lawn-and-garden/a-garden-for-dry-conditions/article

A list of plants for zone 7:https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-7/zone-7-full-sun-plants.htm

If you are really going to do all the work yourself, you might want to look through a book like this one first:

The Complete Book of Garden Design, Construction and Planting by David Stevens, Lucy Huntington and Richard Key.