Good Afternoon Suzanne,
It looks like you're looking for assistance with accessibility settings dealing with an iPad and iMac.
We'd be glad to provide some resources to see if they will help.
With your iPad, we'd recommend taking a look at the following touch accessibility features to see which of these would help with the use of the iPad.
Adjust touch settings on iPad
As for use with the iMac, there are two resources that may help with accessibility features. The first resource will provide information on the accessibility features available, whereas the second resource will provide information with accessibility features using the keyboard.
Use accessibility features on Mac
Change Keyboard Hardware preferences for accessibility on Mac
We hope these are able to help.
Have a great day!