Hope I'm not too blunt here, and you will see it as constructive criticism by one who has been there done that...

60+ years of dogs and a reputation in family as "dog whisperer..." (i'm not, I just love dogs and they can tell)
including one dobe that was so easy 30 yrs back I have forgotten...
And I am humbled every day.
and
I still learn something new from my dobe dog.
If there is one lesson I wish I had spent a bit more time getting ready to train this dobe cuz I am just now starting to catch up 2.5 yrs later. And we'd be further ahead but lesdon learned!
So...thats for context:
? For you as you havent told us much other than "impulsive".,,
Is this your first dog raised from a pup?
First dobe?
What are your goals for her?
If I were you, I'd find a good trainer ideally proven as experienced in dobes NOW.
To get signed up to go to for lessons in person. The point of dog training is first in teaching YOU and by watching how YOU do with pup, as a good trainer can give you far better advice in person than any generic you-tubes, books, frankly.
Petco generic classes are fine, a better than nothing start but I promise you that you will get FAR more value out of working with someone who knows what they are doing than DIY.
So, Even if the best you can do is puppy class at Petco, then AKC basic obedience, and at the beginner level heres some good generic advice:
Choosing the right dog trainer is essential. Here are some tips to finding a first-rate trainer who will make your life easier.
www.akc.org
The point of picking one proven coach at first you'll have a proven template and as you advance then your questions and the answers here will be more useful as they are on point, with the fundamentals you have learned.
And your pup will have consistent signals and expectations.
Training for YOu and dog,
Its a small expense compared to upfront cost of the buying decision, and
Later tearing your hair out as "nothing works!"
Or giving up and going with "board and train", or worse hiring a behavioral dog trainer if you or that unknown boarder really screws up your pup.
Not saying you will...just know that dobes are not dogs. They take more work but the rewards are huge.
You can thank me later.
How to:
1. I'd ask your breeder for a referral in your area, or
2. Find and contact the local DPCA chapter club and ask, or find a FakeBook doberman group in your area and ask for best trainer. You may get some flakes on FakeBook but screen for most likely brst advice from proven dobe owners.
3. If this is gonna be a working dog, or comes from a high drive line, then do the same at UDC.
4. If you tell us where you are maybe someone here can offer a name. Top trainers at executive dog level are booked, referral only but you can go to one of the competing trafe associations and get a list near you:
APDT International is the leading resource for professional dog trainers worldwide. Explore training certification, industry standards, continuing education, and connect with experts to advance your career.
apdt.com
Or
The Certification Council for Professional Dog Trainers is the only independent certifying organization for the dog training profession. Learn about certification, further education, and more.
www.ccpdt.org
and see if that appeals to you.
Even read one book to stick with thats a fit for dobes is a good start. (Maybe some of the most experienced here can suggest one or two.)
5. The commands you cite fall under category of "basic obedience" and if you ever think later to compete in AKC you might as well follow their basics on how to...check AKC and youtube for writtem and video examples.
You an refine/adapt/add later once uiu have the basics down.
@Kobewc You may be a little behind on the power curve here, and your life is about to change...
So no offense, asking random questions all over the innertubes is just gonna generate analysis paralyis, IMHO...
So unless you already have someone proven in training dobes, or other strong drive smart dogs, to observe YOU in the interaction and coach YOU,
Then it will be frustrating for you and since this time of juvenile puppy development is so SO useful- you dont want to waste time in basic DIY mistakes.
Once you do this, ie: "learn how to speak dog and train consistently", then teaching the dog is relatively easy. And you will be amazed what you get after 2-3 years. You are ALWAYS training and it should be fun, so if you are confident by having a mentor (or two in trainers)
You can "listen to the dog in front of you".
The biggest bond in working dogs comes from working with their owner.
Sorry if that comes across as blunt but I think its the best I can do.
If I am wrong, apologies in advance.