Hi there
As a vet, I think the most important thing is to stay calm, this will help you and the cows
Calving ropes are useful, sometimes the calf can need a little pull, and a rope on each foot and a gentle tug can just help the cow out, a jack or calving aid can be dangerous if used incorrectly, but the vet will have one if the calf needs a bit more of a pull, and the experience to use it correctly.
Otherwise you're quite well researched with your list, having colostrum is useful as a boost if the calf is a wee bit slow getting up, but remember colostrum from the cow herself is the best source of antibodies and nutrition. Bottle and teat are useful if the calf is sucking, it may be worth getting a stomach tube in case it can't suck due to being weak.
Shoulder gloves and lubrication are great for getting your hand in to feel how the calf is presented, it should come nose and two front feet, and if you can get a hand all the way around the head when it is presenting in the pelvis, it should be small enough to calve.
Do make sure you give the cow plenty time, especially as first time mothers, they may take some time of being restless and straining before you see water bags. Then it can be some hours before the calf is delivered. As a rough rule of thumb, if you see no bits of calf after the water bags have burst, then have a gentle feel and see if there are two toes and a nose. If so, leave her and see if she can do it herself. Then if you can see parts of calf outside the vulva, with no progress for 20 minutes, it is worth calling the vet. Once you've seen a couple calve yourself, you will get more confident about what you should see and feel, and when you can pull.
Having a good cow halter, and ropes in case she needs to be restrained for calving or even a caesarian section are really useful, it is often better to calve them outside a crush in case they lie down.
Also strong iodine or blue spray for the navels of the calves to prevent infection tracking up into the body, and a good clean calving box set the calf up for a lifetime of good health.
If you have any doubts or any concerns at any point through the process, your vets should be more than happy to talk you through it, even if you don't actually need them there in person.
And like you say, native breeds with an appropriate bull should do it all by themselves so good luck!