I would expect clicking "Get started" to bring you to the second page where you can name your note instead of just highlighting the cryptic text input at the bottom. Also, this must be influenced by the recent flat/material design fad where the text is too light and inputs are indistinguishable from plain text.
While I despise flat ui, esp material design (Microsoft gets it right), this UI is actually pretty good. Of course, design is always subjective.
Nice layout really.
How do you deal with data privacy though ? And would you accept sharing your stack ?