Saving it until the last minute

Hi Brooke and coaches. I have a big presentation coming up for a grant project I have been working on for a year. Thing is, I only have raw material at this point and have to edit four hours of audio and hundreds of photos still. And then make the presentation, and try to practice it. Presentation is in two weeks for 150 donors, including a former President of the US. I know I have to just do it. And I know I have to stop telling myself I am the worst person ever to exist for waiting until the 11th hour to even start. Any tips on presenting? At this point, the procrastinating has already happened. Now I want to focus and pull off a great presentation despite my very obvious self sabotage.