If you use A + Left click to attack move, be aware you can change the keybinding to just use A.
I was watching n3ac3y coach someone and he was telling them to use A + Left click to attack move. Someone in twitch chat told him that you can rebind the keys and he had no idea.
If you want to just use A key to attack move rebind the A key to "Player Attack Move Click" in key bindings. which completely removes the need to Left click.
I've known this for years and apparently this isn't common knowledge?