Another thing you might want to consider is cut resistant gloves. I can't tell you how many times I've nicked my hand between the thumb and Index finger, thankfully the glove did its job. I'm right handed so I wear the left glove while processing birds and I use the right when using my mandolin.
There are also a number of how to videos here https://www.feathermanequipment.com/how-to-videos/ The key is to locate the jugular or curated and cut it without cutting the esophagus. For what it's worth, that's where I bought my equipment. Kill cones are $35 and for most back yard chickens the...
A good cone is worth its weight in gold. I like featherman the best. You want the process to be as stress free for both of you as possible. I hold the bird by the feet and let it calm down naturally, then fold the wings and lower it into the cone. I extend the neck and gently rub the...