You application looks great!
Unfortunately applicants score more points when they have a completed degree, but since you have a fair amount of credits already, that will give you a high score. In terms of GPA, they do consider your cGPA as well, so it would have an effect on your application, but I wouldn't worry too much as it isn't the only thing they consider on the application.
Your work experience sounds good. From what I know, they want applicants to have work experience that is health/medical related, but it isn't limited to just that. You can have customer service related experience or leadership as well (which you can add with your managerial position).
Volunteer experience doesn't really get looked at. It is only used to determine which candidate has a better application. For example, if Person A and Person B had the same points scored on their application, they look at other things like volunteer. So if Person A had volunteer experience that is health related and Person B had none, Person A would likely be chosen.
Hope this helps and good luck to us!