Experience taught me to, where possible, never have any deadlines. "I'll finish this story before next month!" I said. It's still sitting somewhere in my HDD, unfinished, twenty years later.
I've been going for 5 weeks already, at 300 words a day. I suddenly doubled that and it wasn't nice when it collided with real life. I believe I can do it, though. I must. I promised to deliver every day for my story, and up to now, I have. I am writing this comment to motivate myself x)