You should think about getting a Basset Hound. Basset Hounds are around 40-60 pounds, medium sized dogs, their exercise level is low, energy can be decent, good watch dogs, and can be easy to train. Although, I suggest you do MORE research on any breed that others may give you as well. You just don't go off getting a certain dog breed without researching the breed and being around them. To me getting a dog breed without research or being around them is like getting a Border Collie and expecting it to act like, or be like a German Shepherd.
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Destiny

Riley May- German Shepherd Dog

Banjo- Standard Dachshund

Chuck and Waffles- Sugar Gliders