The main difference who is ultimately in charge. Private hospital are normally for profit hospital's run by a number of board members. Religious hospitals are interesting in that they are a religious based organization and receive funding and command from religious figures. Non-profits also have a board of directors, but they are primarily run as more charities or research. Government hospital's are run and funded by the government and are hence more public (unless it is military) and have less financial burden then all the other three.
I think check with someone. Being in over your head means that you feel like you've blown things out of proportion or you're speculating but aren't sure about something. Asking someone else for their opinion and advice is really helpful.
The formula for BMI is
BMI= kg/m^2
A BMI of 25.0 or more is overweight and a healthy and average BMI ranges from 18.5 to 24.9. However, BMI only applies to adults from 18-65 years old. You can always go online and search up BMI calculator and all you need to do is enter your weight and height.
It is a simple guide to proper nutrition is true