Hi there, how do I switch my Apple ID on my iPad

IPads are not meant to have multiple apple IDs on them, so the best way would be to treat it as if you were selling it, wipe your device then set it back up with the new apple ID

What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support

You should know that your apps are tied to the Apple ID, not device, so you’ll be starting over from scratch.