You need to explore all the reasons why you want to get a dog in the first place.
Here's the 'low down'.......For starters, it's normal for puppies to have worms and they need to be treated. Puppy will like to chew on your furniture and your favorite shoes. Puppies also have 'accidents''! Be prepared to clean up lots of poop, pee and possibly even vomit and diarrhea for the first few weeks until puppy is 'housebroken' and learns to do its business outside.
Long term, most dogs need exercise and have to be walked daily, anyway. Dogs are also a lot of work. They will shed on your sofa, your bed or your favorite chair. They need to be bathed at least once a month. Some dogs will bark annoyingly... a lot. Overall health and teeth are important too and they need shots and possible neutering, so you need to find a good vet. They also need to be well fed and to live indoors with their owners and have lots of toys and a warm bed of their own, (bedding will need to be washed regularly too). Your dog should never be left tethered outside for long periods, preferably never! Dogs are social animals and they demand a lot of attention but in return they are loyal and able to express love and devotion like no other pet can.
........But (and this is a very important BUT), if you already have misgivings about having to pick up poop in the park, you certainly won't like picking up poop in your own living room, kitchen, front hall etc. (more than once). You also might want to consider a goldfish, instead.