Christine,
As you have a zoom then a ring to reverse a lens on that is probably the best starting point. My setup with a reversed 24mm straight onto the camera presents several challenges.
Huge magnification = minimal dof and focusing is a bit of a stuggle.
Lens to subject distance around 1 1/2 inches = only usable on subjects that are not easily scared. I was really lucky with the fly in that respect.
Lighting, but you have that sorted as your homemade ringflash is perfect, even a small diffusion panel will work well with a pop-up. My snag with the X is I have no pop-up, so have to use a hotshoe mounted flash and I am still playing with the best diffusion method for that.
Now that ' Lucky ' has had his out of the cage and flyaround session, I will look in my lean to and see if there is anything else to take a pic of.
Outside ... its raining, so I'll give that a miss for now.
Don