Grocery Delivery App Social Media Posts Designs

I am looking to have social media post designs created for my grocery delivery app. The designs must be created for Instagram and Twitter and must adhere to specific color schemes and themes that I will provide and I'm open to hear/apply any suggestions that fits. The content of the designs should focus on promoting awareness of my brand. If you have extensive experience in creating high-quality, eye-catching social media posts that will help to raise the visibility of our grocery delivery app, then I would love to hear from you.