I am afraid on chain saws, I use a dremel free hand, not pretty but gets me back out in the woods fast.
On handsaws..... I dont think I have the patience anymore. You may be having issues because of the "tooth set".
It makes it hard to get the teeth even. I would do as suggested above, check out youtube, I love and learn tons
on youtube. Just remember just because you saw it on youtube, its not the right way but at least one way to
do somthing. Sorry I could not be more help.