MMPI is the wrong forum. Should be LOI.
To answer the question, yes, you can attach an a6000 to a C8, and yes, it is a good idea. I would definitely recommend you get an f/6.3 reducer/corrector. Without it the Moon will not fit on the chip, and you will definitely see coma. The R/C will not flatten the field, but you will not notice the field curvature, particularly if you use intermediate focus between the center and limb, and it will perfectly correct the coma.
You will want to get the backspacing approximately right, which is by spec 105mm from the rear threads of the R/C to the sensor, although it needn't be perfect. As long as you're in the zone it's pretty forgiving.
The a6000 has a mechanical shutter; you will want to use a remote release or the 2s delay setting. Be sure to set your focus using the Focus Magnifier on the highest magnification. I focus on a nearby star with a Bahtinov mask, but you can focus on the Moon itself as well. Use Daylight white balance. Use ISO100, exposure will be something in the range of 1/125s, adjust as necessary to get the histogram bright without blowing out the highlights.
You'll get your best results from stacking multiple frames with Autostakkert. I typically capture dozens to a hundred individual frames (I have captured up to 250 frames in the past but it's tedious with the a6000). Capture in RAW and use RawTherapee to convert the frames to 16bit tif or png for stacking in Autostakkert. Do NOT capture in jpeg or video mode if you want the best results. Do not shoot high speed continuous (burst) mode. The shutter slap from the mechanical shutter will spoil all but the first frame of any burst (you could consider cranking the ISO up to 800 or 1000 and dropping the exposure commensurately to freeze the vibration, but the shot noise per frame goes way up and you would need many more frames to get the same noise level).
Here's some of my lunar images with an a6000 and a reduced C8*:
*Technically some of these were shot with my 10" Dobsonian, but the focal length is almost identical to the reduced C8, so the shot would be very similar either way.