We have an 8 year old poodle and and a 10 week old Goldendoodle. Needless to say they don't really get along because the goldendoodle (Lady) is a rough tough puppy who is 4 pounds heavier then her senior.
Anyway, dogs are awesome. They can also be a headache from time to time. Puppies are a lot of work. They have to be trained in everything except cuteness, they always ace that!!!
My suggestion to you would be to do a lot of preparation and research. Find out what your training techniques are going to be. For example, will you crate/kennel train? If you will crate train, find out how to go about doing it. My poodle is the first dog I've trained from a puppy and I made a lot of mistakes with her. So for this puppy I did a lot of research on training puppies and she is a little gem. After only one week of having her she was house trained and understood all basic commands. But, that's only because I've sunken alot of time and effort into her. After only two weeks she is completely trained how to walk on a leash, but I do walk her twice a day. She hasn't damaged or destroyed anything (yet) because we keep the house super picked up and give her pleanty of play time and bones and dog toys to chew.
I'm not saying it's a cake walk but if you prepare yourself, you will make it much easier for you and your family to live in harmony with this new love.
Also, dogs are a huge expense. You need to consider the costs of purchasing food, treats, bones, toys, shampoo, clippers or regular grooming, combs and brush, and spaying or neutering, leash and collar, oh and vaccinations. It all adds up quickly, but again it is all worth it if you love your puppy like family!
I hope I've helped you make the right decision whatever it may be.
Best wishes!