The LCD is held on with strong adhesive, which isn't fun to deal with. Heat is key for softening this adhesive. First, shut down your iPad.

There are many ways to heat up the adhesive. What I had on hand was a large flat non-stick coated aluminum electric pancake griddle with a temperature knob. I also has an accurate thermometer.

I set the griddle's temperature to 135F as read by my accurate thermometer, and left it for 10 minutes to make sure its temerature was stable.

I put the iPad on the 135F griddle screen side up. I covered it with a fluffy towel and left it for ten minutes to heat up. The towel is insulation to insure the entire iPad reaches 135F.

Starting at the lower right corner (USB-C port side) I used a thin razor blade to carefully begin cutting the glue. Don't go deeper than 1/8".

Once the corner was free, I used a thin metal spudger to work my way around the iPad cutting the glue. Again don't go deeper than 1/8" or you may damage digitizer cables. Also stay AWAY from the front camera. There is very little glue there and you don't need to cut it. Try to complete your first cutting round quickly while the iPad is warm.

Use guitar picks or popsicle sticks or whatever you have to keep the LCD from sticking itself back down as you cut the glue.

Once the glue is all cut you can carefully pry the screen away from the frame. There will be glue tendrils to cut. Pry the screen up starting at the USB port side.