How to replace front glass?

you are not telling us the exact Kindle that you need help with . The device you picked is the FireHD 7 and you can use this guide Amazon Fire HD 7 (4th Generation) Display Replacement for that

matthew santiago you will have to follow the above guide in its entirety. You then need a heat-source like a good hairdryer or a hot air gun at it's lowest settings to soften the adhesive that holds the touch screen to the frame. Soften it with the heat-source and remove the touch screen with same plastic tools like guitar picks etc. Check this video from 7:54 and proceed identically to it.