I usually butcher one deer a year,and have been cutting up my deer for about 30 years, pretty much self taught, but a chef friend helped me get started. I can get certain cuts that I prefer over the butchers. It isnt difficult, you just need patience and a good place to work. Most important: ensuring the deer is well treated after shooting it. empty the innards, Keep it clean and wash it out well and let it cool. Keep it out of the sun when you hang it. There is no need to age it. There is a science to that, and the deer needs to be kept within a very specific temp.range to effectively age it hangin. Most "gaminess" folks complaiin about is poorly cared for meat. A butcher shop is kept immacculately clean for a reason.
Be sure to keep hair and dirt off it skinning. it. when you peel the legs the glands will get covered by the hide, so there is little concern about them- just dont handle them.
Make sure you have plenty of clean room to butcher in. We put roll plastic down over everything. As we cut the quarters off, we drop them directly into plastic garbage bags to keep them clean. vacuum seal bags work great, are durable and the meat lasts longer than in paper wrap, in my opinion. Get a book or two, watch a couple videos on it to see different techniques, and then it will take a few critters to get the hang of it. Keep your knives good and sharp, and touch them up frequently.