Hello and welcome to the forum!
Sorry about your frustration w/
Pages, which is also on my iPad - I've never created a folder but followed
Gabriel's directions w/o a problem.
You might want to first 'force close' Pages, i.e. open the multi-taskbar (double tap the home button or use multi-fingering gesturing), find the Pages icon and press and hold until all begin to jiggle; then press the minus sign to 'shut down' the app; return to the home screen and open Pages - see if the directions given above now works?
If that suggestion fails, then 'Restart' and if not effective 'Reset' the iPad - directions
HERE - good luck and please post back if none of these steps work.