Can you use a Apple touch pad to do indexing?
You can index on a Mac, MacBook, or an iPad. There are subtle differences, like using Command in place of Control for keyboarding functions and using the toolbar icons when working on an iPad without an external keyboard. Here is a link to an article about devices and browsers that work with indexing: https://www.familysearch.org/help/helpcenter/article/what-browsers-and-devices-work-for-indexing
Be sure to start here: https://www.familysearch.org/indexing/my-indexing
If you are new to indexing, here are some tutorials:
13 minutes; Judy Sharp; BYU Family History Library; October 2019
54 minutes; Kathryn Grant; BYU Family History Library on 6/13/19
Here's an interview with Jason Pierson and discussion about indexing, including what's coming in the future.