Start here in properly preparing your old iPad for reuse by your husband:
What to do before you sell, give away or trade in your iPhone, iPad or iPod touch – Apple Support
Now you can transfer data from your husbands existing (donor) iPad to your now prepared iPad. These support pages should get you started with setup of the iPad - and the methods of transferring his data from the donor to target iPad:
Set up your iPhone, iPad or iPod touch – Apple Support
Transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch - Apple Support
Use Quick Start to transfer data to a new iPhone, iPad or iPod touch – Apple Support
If the donor iPad, from which you are transferring your data precedes iOS12.4, QuickStart will not be available.
“Transfer” is rather a misnomer. In reality, your data and setup is merely cloned from the donor to the target device. Nothing is moved or removed from the original device.
An alternative is to restore either your husbands iCloud or iTunes backup to the target device:
How to back up your iPhone, iPad and iPod touch – Apple Support
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support
When everything has finished, you’ll presumably wish to similarly erase your husbands old iPad. If so, just follow the same procedure to properly erase the device.