startup design kit

Hello! I’m looking for an experienced designer to develop a design kit (editable branded powerpoint, editable flyer, color pallet, business card template, etc.). The company is an app startup called Ballmecca. We have the app already built as well as a logo. But we need branding materials for the business. I have a general idea of what I’d like in terms of aesthetics and style, but I’m open to suggestions. Furthermore, I may need additional services beyond just design, so I’d like to understand what options are available and how they can help me reach my goals. If you are an experienced designer with a proven track record in delivering great projects, I’d love to hear from you!