First off lets get things straight. That part of your post that I underline needs to be cleared up. Yes you were charged and convicted. You had a diversion sentence and that makes your record clean.
So back to your question. You don't say what the issue was but if it qualifies for diversion it probably and I say probably won't stop you from going to other countries.
Now here is the kicker, things like a DUI will prevent you from entering Canada, the US doesn't take it as serious as Canada sees it.
So now find out where you want to go. Check out their websites for visitors and read up what types of crimes would stop you from entering. Then nothing will surprise you when you try to enter.