getting a pup is every bit as complicated as having a baby in the house. Vaccinations house-breaking(toilet training n other stuff) at no pint is it easy. Its not very clear what is a soft natured dog in ur opinion, pups r all soft natured but they are every bit as naughty as a lil child.
Dogs are very easily & quickly attached to their human families... and parting a dog away is very unfair, they won't eat even if u're away for a day for the first time, they wud chew up ur shoe or poop on an expensive carpet (if there is a carpet an un trained pup will choose to poop on it) and not know why u r mad at them coz they have no remorse over it, any material means nothing to a dog it dosn't know what it cost u etc, it just dosnt... n these r issues first time dog owners need to be ready to deal with.. research it.. read abt dogs and pup.
Its quite odd that u r "mentally scared" of them and still want them, any pup u get for a month or 2 will indeed become a family member. if u havn't experienced it b4 be ready to be overwhealmed by the attention and affection they offer.