How to construct a health care website?

They already exist, unless you have a specific agenda.

Welcome to Fluther.

There is Web MD and Mayo Clinic, with much better reputations. Unless you are focused on another country.

There is a question of where you would get your content. How to make it searchable.

This would be a pretty costly endeavor.

Have better information, more easily accessible with fewer ads.

I think you might want to suggest some easy yoga poses in your health care site, as well. They are usually good for everyone. Yoga keeps a person fit in both body and mind.