I had a guy believe it or not "give" me a brindle striped bull terrier many years ago but I had to defer him to a friend as I was living in a small apartment at the time with a concrete patio/no yard.
I would visit my friend & the dog quite often, take him for walks, his name was scooter & the dog was a real beauty but nuts like you've never seen, but in a good way!
Scooter was full of energy, maybe a little too full, lol. I researched the breed & he was everything described.
He was an in between dog as in behavior, not submissive, nor dominant, he needed work, lots of it. My friend did bring him to a few obediance classes but unfortunately wound up giving the dog back to the original owner.
Yrs have passed and I still miss this dog! He was definitely a challenge & strong as an ox and stubborn as two mules. But lovable, very lovable.
I see Scooter in your dog.
...JP