The most difficult challenge will be demonstrating effectiveness relative to other charities operating near this space. Computer Aid International focuses on refurbishing used computers and providing them to those living at income levels 1 or 2, spending only around $42 per recipient. Room to Read specializes in building low cost libraries and schools, serving communities at a cost of $5 or $25 per child respectively, and they are really highly rated on transparency and effectiveness.
I think you can justify the focus on Internet and Georgia, but I think you should be mindful of where the bar is set and aggressively try to push towards that. That might involve some hard choices, like whether Chromebooks can help as many students as lower cost options.
Emphasizing that donors choose how much is allocated to administrative costs seems like another odd choice to me. If you are serious about that, then you could get in an unstable situation. Donors could easily have unsustainable preferences here, because they generally lack experience running charities.
If you're just trying to convince donors that you are not wasting their money, I'd focus instead on independent audits on effectiveness. Then be vocal when you make hard choices about expenses, like through a blog of some kind, so you can show you're trying to save money where possible, and trying to spend money in ways that will maximize your impact.
Spreading access to information can be incredibly powerful, so I hope you find a way for your program to take off, thanks for taking on this challenge.