Clean up and make presentation look very elegant

I am looking for a freelancer to help me clean up my presentation and make it look very elegant. The presentation is currently in a good state, but it needs some minor adjustments to make it look more professional and modern.

Ideal skills and experience:
- Experience in PowerPoint
- Knowledge of design principles
- Ability to create visually appealing presentations
- Attention to detail

The desired outcome for the presentation is a professional and modern look. I prefer the use of PowerPoint for the presentation software.