I would get a selection of green evergreen, burgundy, variegated and yellow plants to anchor the design. Plant in two or three layers. Not to close to the house, allow space to grow. Add perennials and some annuals. and

You can search landscape photos on Houzz in a city near you for other ideas.

Good luck.

Check out what native plants do well in the area as well.

Try grownative.org and look for Missouri for sure bets on what will grow