I have the desire to be healthy and happy.

Desire is not a small thing to have. There are stretches where it goes missing altogether, and anyone who's lived through one knows that wanting anything at all is already a form of health.

Notice what's actually being claimed — not that you're doing it, only that you want to. That's the earliest and most fragile part of any change, and it's genuinely present in you or you wouldn't be reading this.

Somewhere there's a pair of running shoes bought with real intention and worn twice. The intention wasn't fake. It just needed a smaller first step than the one it planned. Make the step smaller. Keep the wanting.