Share 'Changing gears; around what rpm?'

Hello everyone, I don't know if this is the right place to ask this question, but i'll give it a try. I own a 1999 Ducati Monster 600 Dark. She has 29.000 km already, last 2000 ridden by me. Now, i know this might sound foolish, but being my first bike and all.. well, i'm not sure if i change gears around the right rpm. I heard too many things so far, so i'm asking you: around what rpm do you c…