1. Adopt a long term attitude. Rather than, I want to gain by this or that date, think in terms of I want to gain this or that amount, and I’ll continue as long as it takes to achieve it. As for extender, hanger, or manual - everybody gains differently, and the only way to get a “right” answer to that question is to find the right answer for you via personal experimentation. I personally gained another 0.5 inch beyond my newbie manual gains by going to a Bib hanger while continuing the manual routine.
2. Hanging requires mastery of technique. If you happen to have very good technique from the beginning, the risks of injury are very low, practically zero. Unfortunately there’s no easy way to learn technique other than trial and error, and doing a lot of reading. The biggest danger is cutting off circulation for too long, and so limit your hanging sets to 15-20 minutes on, and 5-10 minute breaks. Another danger is pinching the dorsal nerve in the penis causing temporary numbness. Another “danger” I experienced was lower back pain. You may have to invest a lot of time and energy in setting up your hanger just the right way, and finding a comfortable position to hang that won’t aggravate your back. Out of all the forms of PE, hanging is the biggest time drain in my opinion, so it might not be a good fit for you. It’s conventional wisdom around here that you want at least 10 hours per week in the hanger, which works out to more like 15 hours when you factor in all the breaks and wrapping.
3. I didn’t find discoloration to be a problem with hanging, but if you do, the solution is to work on your technique to get better circulation. Or lower your set times to refresh the penis with oxygenated blood more often.
4. I’m loving the “Cock Coil ADS” you can search that for a thread of the same name on how to make it.
5. Haven’t done any extending.
6. Uncut guys have more challenges with getting a good attachment in hanging. It’s doable, just requires more technique.
Keep in mind that gains slow down a lot after the newbie period for most guys. You may even still be gaining with manual, at a nearly imperceptible pace. Be patient with whatever you choose, and if you do go with hanging, I recommend reading some of the basic threads in the hanger’s forum. Another thing you can try to spark post-newbie gains is incorporating regular decon breaks. Good luck.