Minimalist Brand Identity & Deck

I already have the skeleton of a creds deck that I built with AI, but it isn’t polished enough to send to prospects. What I need first is a clean, professional refresh of that PowerPoint along with a simple colour palette that can serve as the cornerstone of my brand identity... (Budget: £250 - £750 GBP, Jobs: Branding, Corporate Identity, Digital Design, Graphic Design, Logo Design, Visual Design)