I hand sharpen all my bits...It is something I've been able to do for over 30 years. It is very much a skill like blade grinding...can be learned by anyone, some guys quicker than others.
Knowing how geometry affects material being drilled will give you understanding of best included angle, back rake, how much to thin the webb, etc.
Busted drills are super cheap at flea markets and garage sales...a great way to learn...start at about 3/8 dia for ease of seeing what you are doing...then go smaller.