I am here seeking step by step guidance on developing on openstreetmap web page that will have markers for all our company locations around Africa. I would like to have a feature where when a user clicks or moves a mouse on the marker to show the whole info regarding that location, that is GPS coordinates, contact person, contact cell number, contact email address and an image of that contact person.
Where can I start on this project. The project is due in three days from now.
Thank you in advance for giving a guidance to my goal.