Ok, if you're new to presenting i would only do 10 slides, which gives you a minute per slide and will help you keep on track with your timings.
They have asked for 3 key areas. So I would do one slide on how you'd support the project, one on how you would lead the project and one on how you'd add value to the project.
You have 7 slides left.
The first slide is a good place to introduce yourself. You can put some of your experience that's relevant to the role on this slide.
The next slide may be a good place to demonstrate that you understand the business/project.
The final slide can be a summary.
Leaving you with 3 slides to play with. You could do 2 per key area instead of one. So in the support section, you could say what you'd like to do on the first slide and then on on second slide give examples of how you have done this previously. And repeat for the other 2 key areas.
10 slides. That stick to the brief and tell them about you and give them an idea of what you'd like to do and what your experience is.
Don't over clutter the slides. And don't have information transitioning in because you have to click each time to get that info on the screen. And only use the minimum text. They should have all of the basics from the slide deck but get the interesting info from what you talk about.
You've got this. Show some passion through the slides. Stand tall. Let us know how it goes!