Design, branding and logo for a web application

Hi, my name is Jorge and I'm from Guatemala. I need to make a web application which is based in the site map that I attach. To be cordinated I will tell you about of the project: The turn of business is medical tourism, this means that there are people (say Americans) who come to countries like Guatemala to get certain medical treatments like dental treatments, vision inspections, physiotherapy and others. This is because it is cheaper to come to countries like Guatemala to perform these treatments than to do them in their own countries. These "tourists" usually like to come to know the country too and to be able to visit the different places that Guatemala offers. The purpose of ​​the web application is to ease the process of the "tourists" to be able to make appointment with doctors, hotels reservations, and tourists trips that you wish. In the site map you can see that there are 3 user roles: User: Tourist who wants medical tourism service Doctor: Doctors can publish the services they wish to perform through the application Tourism Service: Tourist service companies may publish the travel services offered to tourists. I need the design of the web application, branding and logo of this business. I have an idea with the logo of the image that I also attached that would be a backpack with a medical cross. I also want to make a mobile application later to take into account in the logo. I want the colors to be used: blue, green and white for their meanings but I accept suggestions. I have not yet defined a name but we are still thinking about it.