If you were just starting out with digital image processing and going to use Lightroom 6 Classic, not the Creative Cloud version, (although I realize there are many similarities)(Lightroom 6 Classic is a given so please do not suggest other software), and you had never used Lightroom before and you only had one resource (book, on line tutorial, or ?) to use to learn to process in Lightroom 6, what would that resource be? Thanks in advance for any guidance that you can provide.

I have Manfrotto heads too (geared 405), I have found ProMediaGear to have great, well made products , great customer service and very good pricing. I used their C60 quick release clamp with their PLNMBD18 L bracket for a Nikon d 850 with battery pack and it works great. They have other combinations specific to camera models. Promediagear.com is the site. Hope this helps.