I'm doing it every game whether if I win or lose but always been curious if my xp went up or didn't get anything at all. You can actually do this in League(it's where I got the habit of doing it) and have no downsides at all to cancel anim...

You have to choose a agent. So your abilities will be that agents kit + an extra ult of any agent. It cannot be of that agents itself. So for mine it will be Fade + neons ult. What will your be?