Can I Select a Range Of Cells In Numbers Using Shortcuts?

Is there a way to select cells or a range of cells in Numbers using shortcuts? I’m new to Shortcuts and don’t know where to start. The reason I’d like to do this is
I have built a fairly complex spreadsheet in Numbers that combines output from various resources that are not capable of Numbers collaboration. To gather the data, I have written an Automator / Applescript routine that copies the pieces from the various resources and adds them to my Numbers document then runs the calculations. A task that used to take 20 to 30 minutes a day, now takes 43 seconds.
Also, is there a way to have two spreadsheets open at the same time on the iPad?
I’d like to have the capability to do both of these tasks on my 11” iPad Pro. It has more horsepower than my MacBook Air but appears to be limited when doing anything but creative work.
Cheers,
—–
Ed Weaver