I watched this thread in the hope that someone more knowledgeable would comment first. However, its very quiet in here so I thought I'd give my 2 cents in the hope that someone shoots me down or corrects me so I can improve for my next attempt.
I based my first go at calibrating my E7 on bits and bobs I picked up from the 2017 OLED calibration thread on AVS Forums but it took at least a week to get through that thread and most of the time you have very knowledgeable people sharing very useful information between themselves that seemed like another language to me. In the end, I never managed to source a simple step be step to DIY calibrating on the cheap (i.e. not Calman)
I think your equipment should be fine, at least I used similar. I have only had a go at SDR so far but used an i1Display pro and a Chromecast to transmit the internal patterns. I have heard that MobileForge is a good app for Firesticks but I don't know if it is Calman specific.
First off is the brightness and contrast set using the flashing white and black patterns. I stuck with the default (contrast 85, brightness 50) but some have had to tweak brightness a bit, and others have quite different settings used in conjunction with an extended colour gamut.
HCFR has a WOLED specific profile for the i1Display Pro so its pretty easy to get going. Apparently you should look at the 2 point WB first and adjust only the upper setting, and I think only downwards (not sure if that applies to RGB and/or luminance as I didn't do this step but intend to next time)
Then do the 20 point. I tried to correct RGB errors first and then the luminance values to reach my target gamma.
I was targeting 2.2 for day viewing and 2.4 for night, so looking for a straight line. Not really sure what I would look for if targeting BT.1886, but I believe it is similar to 2.4.
I know you said you weren't bothered about CMS but apparently you can safely use the CMS within a few notches on the 2017 OLEDs in SDR mode. I found this a bit of a lottery as I wasn't really sure when it was best to play with saturation, tint or luminance. However, I ended up with pretty good deltaEs and the image look (a) pretty good and (b) improved on the OOB settings.
For HDR, although I haven't tried it myself, it sounds like you have the best disc available. Apparently you shouldn't need to do much more than tweak the 2 point as HDR is pretty good OOB.
Dolby Vision is a no go unless you have Calman and an expensive pattern generator.
It would be great if some of the other 2017 OLED owners who have had a go at DIY calibration could pitch in and put me right.
@Parry @raymondo77