Q: My documents created on Pages can't be open now because I'm on TextEdit and I don't know how to get out...what do I do?

have you downloaded the documents?

Right-click (or ctrl-click) on a document and choose 'get info' from the menu.

Go to the 'open with' section and see what's selected.

If it's anything other than Pages, use the drop-down to change it, then click the 'change all' button to  ensure all the others open in Pages.

If you only need a few to open in Pages, skip the 'change all' step and do 'get info' on each one seperately.