Today i replaced the 36mm extension tube for a 12mm one and a flash for the LED ring light. The flash i use is a Yongnuo speedlite YN560 , a relatively cheap flash that works really good. On the Fuji i use it in manual mode whereby you can sett the strength relatively easy. You can also manually zoom it if you want, I put it in the widest setting and pointed it up and attache a peace of A4 paper as a reflector. I need to do this because I want to shoot close to the front of the lens and the flash can not be pointed that low. But reflecting the light via a peace of white paper also disperse the light more and can crate the effect of a sunny overcast.
The shutter was set to 1/250s because i like to shoot without tripod and with the 50mm lens you don’t have to worry to mush. I like to use the view finder and push it against my eye to stabilize the camera even more, your eyes is then like a third arm. If I use the back screen i I like to use the strep from the camera that hangs around my neck as a stabilizer by stretching my arms and put tension on it. I played a little withe the aperture settings, I used settings between 1.8 and 5.6 and I also changed the strength of the flash, most of the time the flash was at its weakest (1∕128) setting.