Since no one else is respond to this post, I will offer some very quick advice.
Firstly, what you are suggestion is very doable. You might want to look at Jquery UI draggable elements https://jqueryui.com/draggable/#scroll. There is nothing technically challenging about this concept.
Secondly, your specification is too vague for anyone to actually build. Programming is an exact art since the computer is the most unforgiving thing to work with (computer = fast + stupid). I would suggest that you work with a UI/UX (user interface/ user experience) person to refine your specifications. It would be helpful if the UI/UX person has some experience with programming to validate your concept and turn the idea into build-able specs.
Usually programmers work with UI/UX designers (and sometimes visual designers and marketers) to vet out the concept before starting to work on the code. The reason for this is that coding is a big investment in time and just the slightest change can have profound effects on the underlying code because fairly simple things can turn out to be very complex when you factor in everything.
The way that you have your description right now, most competent programmer would not be interested in this project because there seems to be a big gap between what you want and what you know from the technical perspective. My advice is to narrow this gap by enlisting the help of a UI/UX designer first.
Firstly, what you are suggestion is very doable. You might want to look at Jquery UI draggable elements https://jqueryui.com/draggable/#scroll. There is nothing technically challenging about this concept.
Secondly, your specification is too vague for anyone to actually build. Programming is an exact art since the computer is the most unforgiving thing to work with (computer = fast + stupid). I would suggest that you work with a UI/UX (user interface/ user experience) person to refine your specifications. It would be helpful if the UI/UX person has some experience with programming to validate your concept and turn the idea into build-able specs.
Usually programmers work with UI/UX designers (and sometimes visual designers and marketers) to vet out the concept before starting to work on the code. The reason for this is that coding is a big investment in time and just the slightest change can have profound effects on the underlying code because fairly simple things can turn out to be very complex when you factor in everything.
The way that you have your description right now, most competent programmer would not be interested in this project because there seems to be a big gap between what you want and what you know from the technical perspective. My advice is to narrow this gap by enlisting the help of a UI/UX designer first.