There's a lot of focus on natural and "mature" or "age appropriate" hairlines on forums. And for good reason. If someone goes too low, too early, and their loss continues behind the transplant, it could end up looking weird. At least if they don't have grafts left to fill in behind.
In your case, that risk looks rather low. In that case, I see no reason to worry about a low hairline. Many people have naturally low hairlines even at an old age, and I never heard anyone say that those hairlines look unnatural (they aren't..).
So this kind of low hairline isn't for everyone. But it *seems* it could work for you. I'd be happy too in your shoes.