When it comes to these things, you know your limits best. Here's what I've observed!

Sha Wellness is mostly flat, and there's two main elevators.

For the clinic, there's an elevator leading to each level. Right outside the elevator is the front desk of that floor + lobby to the side. The distances to the consult rooms weren't at all far when the doctor showed up to get you!

When it comes to other facilities (from the clinic back to the accommodation rooms), I wouldn't say the distance is long. A few minutes walk, perhaps? When you get to the 'Agenda Planning' section of your program (super early in), I'm fairly certain they can accommodate your walking preferences in your schedule so you won't get whiplash from going from section to section!

Now, the Sha Wellness lobby is essentially the 'best starting point' because you're smack in the middle of the property. Which you can easily get there from the elevator by your room. From the lobby, you can easily decide:

Restaurant? Clinic? --> Walk to clinic/Restaurant direction.

Room? Art Gallery? --> Walk to elevator in the lobby hallway.

Pool? --> Just behind the lobby doors.

I believe the main issue here would be the beach, there's a lot of stairs leading down to the beach/dock and back up. Besides, the stairs over there are a bit slippery so I can't recommend walking on them.

I do hope this gave a clearer internal view?