My fire stick wont allow me to sign into my internet connection

Just incase the problem is still on going, I want to assume that you have disconnected and reconnected the fire stick with your HDMI slot. Perhaps tried a different HDMI slot on your TV? Does your TV recognize the fire stick when you plug it in? If not, remove a device that you know works, from their HDMI slot and plug in the fire stick. It should be recognized by your TV. If not, return the fire stick to the store. Depending on where you bought it, they may be able test it with you there. Best Buy is really good for this, but you need to ask.

Moving on, once the TV recognizes the fire stick in the proper HDMI slot, it is just a matter of finding your wireless network, logging on to it and go forward & do great things!
just follow the setup steps on the setup menu. I reran thus through my Amazon Fire equipment to make sure.
As long as there isn't advanced security set up on your wireless router, there should not be any problem.

I would be very curious to know if this helped you.
Regards,