Reddit mentions of YGR Pet Comb,Dog Long Hair Brush,Large Animal Grooming Rake

Ah I see. Well nothing you said made me cringe :) there’s nothing wrong with a light clip around the edges to keep them sharp looking. That won’t hurt their coat at all. For the hocks invest in a steel dog comb (about $7-$10) so you can comb them straight out away from the dog, and then cut a straight line down to the ground. Use a slicker brush for the feet, comb the hair backwards and trim anything sticking up away from the top of the foot. Any straight lightweight shear will work. You won’t be using them so much that you have to worry about high quality. Pick a price you’re comfortable with and get those. The thing about cheap shears is they are usually so tight they are a pain (literally) to use. So loosen them at the screw that’s holds the blades together and they’ll work better for you.
For the body trim, always scissor in the direction of the hair. It grows in all ways. If you cut straight across the chest from east/west, you’ll have a slash mark in the coat. If you scissor at the same angle as the hair (say a 45 degree angle) more like NE to SW you’ll have a nicer clip. Experiment. Trim any hairs you find undesirable. You’ll make mistakes, but it’s hair - it grows back.
You main objective with a double coated breed is getting the fluffy undercoat out. But only the stuff that wants to let go and come out. Don’t force it, A “slicker brush” and possibly a “Rake” is all you’ll need. Run these brushes across your own skin to feel the amount of pressure you should use. That way you aren’t pounding the brush into the dog.

As far as behavior... just act like a professional when you start them. No “playing” about grooming. It’s a part of their life, and if act like you expect them to settle- they will. The less eye contact while grooming, the better, then eye contact and praise when you’re done. Just like they learn to sit and behave when in public, so can they learn to stand still and be groomed. Practice from day one in short one min (tomorrow 2 min, next day three etc) training sessions.

Putting them on a table will help. Like a picnic table if you don’t have a grooming table. Put a towel down for them to stand on, so they feel safe. Don’t attempt to train this from the floor. That’s your play area with your puppy, the table is the grooming area. They figure it out fairly quickly what happens where, and what’s expected of them, Be consistent and they’ll learn it’s just a part of life. Be aware that some puppies scream the first time they are bathed. Just keep your voice monotone and calm but do not stop or hurry. Find a phrase you like to repeat (I say “you’re fine” over and over with a low voice, no squeaking at them) They can’t hold that fear or stress long and when they relax is when you praise. But rushing will only make them more frantic. Remember; whatever you don’t say no to, means you are saying yes. Whatever you allow the first day, they will believe is how it’s always going to be. So be firm, consistent and focus on the result you are trying to train for. Focus will help you know when to praise.
Getting them used to a blow drier is important too. Use a methodical advance and retreat training for this.

I think it’s great that you’re planning ahead. I understand your desire for mapping your path before you even get the dog. I bet you’ll be fine teaching your dog to get groomed by you. You seem very capable and present. Traits that dogs respect and respond to. I know this was a long reply, but I wanted you to have the information you were seeking. Good luck and have fun with all this :)