Canva Presentation Enhancement

I have used a Canva template presentation with video and photos embedded. I have loaded all the photos and video into presentation but finding it hard to add timing to the photos slides and add music to my presentation... (Budget: $25 - $50 AUD, Jobs: Adobe Premiere Pro, Audio Editing, Canva, Digital Marketing, Graphic Design, Music Production, Powerpoint, Video Editing, Video Production, Video Services)