That was a marvelous first post. Not just using the decktags, but explanations!
You have gotten some excellent specific feedback for your deck, but I would like to take the liberty of making a few suggestions.
- On going to the local store: it's all about expectations. Each store is different, but calling them up first could garner some suggestions about how best for you personally to start. Sometimes there are less formal experiences than the organized tournaments where you could play less competitively. Going 0-4 without winning a game (which I've done) is just a thing. If I learn from it, enjoy the process and meeting people, I can appreciate it. If I just say that I lost, it was hopeless and I'll never get better, then it would not be a worthwhile experience. Going with your friend at a time when you know other people might be available to play casually would be a way to ease yourself in and see whether to go to FNM.
- Go to a prerelease if you can. They are fun, you learn about the new set and it's a less formal tournament.
- There is an excellent learning resource on the Wizards of the Coast website here.