I'm not an electronics pro, but I'm able to replace my own iPad batteries. Made this video for an iPad 6 battery replacement. Be patient when removing the screen - that's the part where you can break things...... Do at your own risk!!

There are several different kits online. I used one from Amazon below that came with the battery, nice tools, and the adhesive.

https://www.amazon.com/gp/product/B07...