The Federal Government has a program that people can apply for that can subsidize or in some cases pay for internet services. People living on Tribal Land can receive up to $75/mo and people not on Tribal Land can get up to $30/mo. There is also a program that will provide up to $100 towards a computer purchase (laptop, tablet or desktop.
The information about the program and the application form are here: https://www.affordableconnectivity.gov/