Sounds like a good plan re: your ideas and coding.
Best of luck with the move! What part of NYC will you be in? I lived in the Upper East Side for 3 years before coming out to LA.
Totally identify with the feeling that you could have started earlier. Everyone’s been there. The past is the past, so you need to focus on the present and future.
Re: your Vayner app, I wouldn’t lose hope just yet. Sometimes it takes HR some time to review applications. I’d follow up in another week. Also, there are a few different entry level jobs open if you’re interested in applying for more than 1 thing: https://boards.greenhouse.io/vaynermedia#.WboZ93h1iIw