At 14 weeks old, you have LOOOOOOONG way to go!

My puppy is about 16 months old and I still have setbacks, especially with potty training and chewing. One thing I did right from the beginning which worked for me was to buy a "potty bell". It hangs on the door that puppy goes out to potty. Every time I took her out, I'd ring the potty bell and yell, Potty Time, Ring the Potty Bell! Then we'd go out, she'd go, I'd applause and make a fuss and she'd come in and get a treat. It took EIGHT months for her to finally understand, but now she rings it whenever she needs to go out. It is loud enough that I can hear it anywhere in the house. It is a lifesaver (and visitors think it's really cool). At night, she has her own routine and licks my elbows when she needs to go out. She still won't consistently poop outside yet, I'm not sure how to fix that issue, but at least it is easier to clean than a wet puddle.
As for the chewing, when I caught her, I sprayed her with a water bottle and gave her a chew toy. She's chewed more drywall and carpet that I care to count.