I clicked on my document and im trying to edit but nothing is happening

CHECK IT PLEASE I HOPE IT'S HELPFUL FOR YOU.

                                                                                       https://acrobatusers.com/tutorials/how-to-make-simple-edits-on-ipad

what do you have?

1. Adobe acrobat reader
2. Adobe acrobat DC

tell us adobe reader only for reading printing etc...adobe acrobat DC for editing signing and a lot of more

Be sure your document is not protected with password. Please upload screen shot.