Hi sueny,
We see you're having some trouble with needing to restore your iPad, and we'll be happy to help work with this on you.
To start, let's follow the instructions outlined in this article: If you can't update or restore your iPhone, iPad, or iPod touch
Specifically: Press and hold both the Home and the Top (or Side) buttons at the same time. Keep holding them until you see the recovery mode screen. You may want to ensure that it is plugged into your computer with updated macOS/Windows and iTunes open on it.
Let us know if you continue to run into issues!
Warmest regards.