Good to hear from you. You’ll find a whole bunch of iPad enthusiasts in this Forum who are only too willing to help other iPad owners and to hear of their experiences. Don’t be afraid to post any questions you may have or use the ‘Search’ button near the top of the Forum web page. I usually find I discover one new interesting and useful piece of information about my iPad every day - and often not even what I was looking for!!
Hope to hear from you soon with your thoughts about the iPad.
Have fun and enjoy your iPad
I don't think it is possible to have multiple documents open at the same time - just one document at a time. However, you can copy-and-paste between documents, though you have to open one document first, copy the material, close the document, open the second document and then paste the material into it. Yes - it's tedious....
If you don’t already have it you can download a copy of the iPad manual for free.