Not good friend just learned this way there were no cad programs when i went to school this was the way we did things. as always i wish you good luck it just takes practice leather work isn't rocket science its leatherwork, cave men did it. Same thing with a compass or wing divider only faster, find the center and your good to go.
Ps at my age i have lived completly through the computer era. Learned dos before computers had memories lol. many cad programs, inventory progams, spreadsheet programs till the cows come home in the end most are not easier and way not faster just an endless learning curve of obsolete programs and upgrades. Just my opinion based on personal experience of course. I have two daughters that draw digitaly, one does animation. she built this video thing, an animation that moves and talks to her voice and movements she uses the character on things like youtube. I'm not bashing modern technology by any means it has its place.