Video Editor

I need a part time video editor to help me edit videos for my YouTube channel. My channel is ---------- - I cover foot and ankle health topics such as ankle sprains and plantar fasciitis. I need help with adding in professional looking text and diagrams to help me explain things. I will provide the majority of the B roll shots but I need help with tasks such as making a small square or circle with my face in the corner while powerpoint in rolling (masking) and highlights or circles or arrows around important structures. I currently use Davinci Resolve.