can I download an operating manual for my iPad?

Yes,it is definitely all there. In the link that Skydiver provided, identify the IPadOS system you currently have, click on it, and start reading the info.

Otherwise, register on line at your nearest Apple store for a beginner’s workshop.

The iPad User Guide is a rich source of frequently overlooked information about your iPad and iPadOS. The Guide is available both online using a web browser (such as Safari), or as an Apple Books download:

iPad User Guide - Apple Support

https://books.apple.com/book/id1567104892

The Tips App, installed by default on all new models of iPad, provides a brief introduction - and leads you to the User Guide. In case you missed it, here is a link to the Tips App:

https://apps.apple.com/gb/app/tips/id1069509450

Apple also has a huge YouTube Channel - containing videos and feature guidance:

https://www.youtube.com/user/Apple

Give a look here, it may be Apple Books but many show that they can be downloaded. You’ll need to find your model

Apple - Support - Manuals