Stop thinking about angles, it only makes things harder on yourself. There is NO correct angle only a correct shape for the blade geometry and steel quality. Learning what is best for each blade will be a life long experience, trust me, after 20 years of sharpening i'm still working on "what angle?"

Holding a correct and consistent angle is much easier than most think. Buy a mora knife and practice on a bench stone and feel out the movements needed to sharpen the whole bevel in a single pass. This will give you more useful information than pages and pages of text could ever do.

There is also specific points of pressure you can apply that will make the knife guide itself on its proper curve and held angle. I can give a link later to a thread that explains it better if you would like.

For todays modern super alloys its hard to beat diamond sharpening equipment. For your busskin and like carbon steel blades its hard to beat a big Norton coarse/fine and some sandpaper.

Also, different steels respond in different ways to various types of abrasive media. For example: Ceramics work best on stainless steels, diamond on very hard alloys, water stones natural stones and sandpaper on carbon steels. There is much more to it than that but it gives u a idea.