Whether you separate the glass and the LCD doesn't affect the rest of the tablet. They both come off as a unit when you peel the glass off the tablet's double-sided tape. After that, you can do whatever to it without affecting the rest of the tablet.
I looked on YouTube, but I don't see a video for someone replacing glass this large.All the glued-glass videos are for phones. Most of the tablets don't have the glass glued onto the LCD. There's a video of a 10.1 Galaxy tablet being repaired, but the glass lifts off the frame and isn't attached to the LCD.
Sooo... I'm very dubious of just replacing the glass. I think you'd have a tough time getting it to look good, even assuming you got the old glass off. Someone experienced and with all the right tools might be able to do it.
Is there a service for that? My goal is for this repair to cost no more than roughly a hundred dollars. The only service I saw was a link to people who fix the older version of this tablet.