What dog breed should I get?

I've been wanting a dog for some time now but I've been wondering what breed would be best for my lifestyle. I've always favored Doberman's but I'm also not sure if one would actually be able to be happy with my family. I have two nephews (5 y/o, 1y/o) and a lot of other younger family members so we would need a dog better with children and people. I'm pretty active and like walks and hikes as well so I'd want to be able to take the dog out with me. My main worry is I'm worried I won't be able to give the dog enough attention so we want one who's better with staying home for a few hours most days of the week without someone with them. If you know any that might be a good fit with us pls comment!