Why people are obsessing and putting all of their self worth upon a yearly online event? Why people fret over NaNoWriMo failure so bad? 
Maybe people should rethink how they approach NaNoWrimo, because it bugs me so much seeing people getting down for things they can't help. NaNoWriMo, especially for beginner writers, should rather be a training event than competition.
NaNoWriMo do not and should never determine your worth as a writer. Many big writers out there make it big without NaNoWriMo, heck perhaps not all professional writer out there able to reach the final goal. Plus, I think it kinda too shallow to make word count as indicator of success in NaNoWriMo; just pour catnip to your keyboard and perhaps your kitty can finish one. The quality of your writing does not determined by it.
This is your fucking first time writing, don't expect you can finish a marathon if you never jog even once in your life. The 3000 word count is good enough considering how busy you are and it's your first time! Think about it, you are not that bad!
It is also set in the busiest month of a year, with kinda impossible-ish goal and numerous participant; you are more inclined to fail than to win it. Just take this chance to set a habit of writing rhythm and discipline, you'll be good. 
This sounds kind of pessimistic, but please think about possibility of failure every time before you try something; that way you're less to feel disappointed because you already saw it coming.
. Hardest thing in life includes accepting failure, even to a person who failed many times and never make it like me I still can be disappointed with even more failure.It's a difficult thing to get used to, not as easy as how the Priestess from Goblin Slayer saying "You get used to it."