I think the best advice would be what was given to me by Troy when I first touched a macro lens a few weeks ago. Forget the accessories, and, get used to shooting 1:1 with the bare lens.
Once you get comfortable with shooting, you will then start adding flashes, remote triggers, diffusers, extension tubes, software, and the like.
You will be disappointed with your first shots. But, that's the thing, it's all part of the journey.
I'm not a macro shooter, so, can't really say much more. I am more into the other end of things -- landscapes and portraiture.
Enjoy the new toy.
H