CONVERTING A PDF TO OPEN OFFICE

I SCANNED A FORM FROM MY PRINTER TO A SKYDRIVE DOCUMENT FILE. I USE WINDOWS 8.1. I TRIED TO CONVERT THE PDF FILE SO THAT I COULD FILL IN THE FORM AND USE IT. IN OPEN OFFICE IT WAS ALL SCRAMBLED AFTER BEING CONVERTED. I AM REALLY NOT VERY GOOD AT KNOWING HOW TO DO THIS TYPE OF STUFF, BUT I CAN FOLLOW DIRECTIONS PRETTY WELL. ANYONE HAVE IDEAS FOR ME?