Realistic 2D/3D Technical Process Animation

I’m producing a five-minute educational module that explains a technical process step by step. To make the content engaging yet accurate, I need a seamless mix of 2D overlays and full 3D shots rendered in a realistic style—no cartoon or abstract looks... (Budget: $250 - $750 USD, Jobs: 2D Animation, 3D Animation, 3D Modelling, 3D Rendering, After Effects, Blender, Cinema 4D, Illustrator, Maya)