Hi, I'm Ryan. I graduated from the Android Developer NanoDegree on October 9th, 2018! My journey was long and difficult but rewarding. I had very little coding experience, no experience with git/github, no experience with object-oriented programming and had to juggle a full-time job.
My advice to help you graduate is to do only what the rubric requires you to do and nothing more. The most important thing is to graduate. That said, you can work on project aesthetics later on. Similarly with your capstone, you want a minimal viable product. Don't try to push out a PlayStore-worthy app. Just get something that meets the rubric then work on the project further after you graduate.
Lastly, in the same spirit, since we are in a major time-crunch at this point, if there is a way to do something that's easy versus a harder way, go with the easy way for now and try the hard way after (i.e. Android widgets is a great example). Good luck everyone, I know you can do it!