will like to know how to do this also new to HoN

stop or hold and stop command
should be "S" on default, but you should bind a key to "hold and stop" in options

Either that or move the hero as the attack animation is past the actual firing/hitting.

Not so important to do this when last hitting creeps. It's more important when you're chasing enemies to save time, and in that case you just move in the correct time towards the path you want to.

I think it's good practice to do it all the time, if possible.

This.

easiest to master with valk, since you can see her starting to throw her spear and when you get it to go off you click to move

I don't think there's a certain hero with which you should "master it", seeing as each hero has different animations, different speeds, etc. You have to practice with most of them to get the different ones.

if you can do it with one you can do it with all

i feel vindi is easier because his animation is really slow. it makes it better training