I need help updating my iPad

Try the first link I provided for assistance, the one titled If your iPhone, iPad or iPod touch won't update. You can also take a look at the information in this user tip. Updating iOS: common issues and solutions - Apple Community

See this, If your iPhone, iPad or iPod touch won’t update - Apple Support If you have the error message, does it contain a number? If so, see this, iOS update and restore errors - Apple Support

A little hard to help/advise you when you provide little to NO useful information about your iPad.

Here are my questions to you.

Can you, please, confirm what year and model iPad do you have/own?

The “A” model number can be found on the aluminium back of your iPad, in very small print, right under the larger bold print “iPad” on the back of the iPad.

What iOS/iPadOS version is this iPad, currently, running?

What is the rated, internal data storage space/capacity of your iPad model and how much of this free, internal data storage capacity is left inside of your iPad model?

All of that additional info can be found in the Settings app, General settings panel, About.

Please try to make an attempt to answer all questions asked.

Thank You.