Need Help With Quick Riven Q AA?

So, I have been playing Riven for a little while now, but still I am unable to do the quick AA Q M AA Q etc. combo. I either move all over the place with my q, or don't get some of the auto attacks. I have watched numerous guides, and have practiced it a ton on golem on custom, but I am simply have so much trouble doing it. Is there a trick that could help me? Is there something that I am doing wrong? Thanks in advance :)