If you pluck it, you need to scald it. You can pluck by hand. Where the pluckers come in real handy is if you are processing several at one time. Plucking by hand is slower, but if you are only doing a few, plucking by hand works OK. But you do need a pot of hot water big enough to dunk the chicken in. Like Bucket04 said, once the wing feathers come out easily, it is ready.
You'll find that we do it a lot of different ways. Part of that is different experiences, part is what equipment we have on hand, part is how many we do at one time, and part is what the end use is. I cut mine into pieces when I butcher. That makes a difference. I also free range mine so feed does not cost much. And I only do a few at a time. I prefer them live and walking around until I need them as opposed to being in my freezer if the power goes out. If you are raising broilers, you don't have that option.
Especially for young birds, I often skin them. After dispatching them, I cut the feet off just at the bottom of the drumstick. Then, I make a cut across the breast and start working the skin off the legs, wings, and the rest of the body. The wings can be a problem. I usually have to cut under where the big feathers grow to loosen that enough so I can pull it off, and I discard the wing tip. There is just not enough meat there to make it worth the effort to skin it.
When I get the skin pulled back to the vent area, I cut the tail off and cut around the vent. From there, it is just like a plucked chicken.
Good luck! There are ways without the big equipment, but if you are doing several at one time, the investment in some of the equipment is a pretty good choice.
Good lick!