I personally did a 4 week semi-intensive, didn't regret taking this approach in the slightest. I started on 3 days a week at 2 hours per lesson, and worked up to 4 days a week at 3 hours per lesson. Surprising how quick the time goes, actually doing a 3 hour lesson meant that I was learning most things while the ball was already rolling and I'd already had time to get into the groove.
What time do you start work?