Time needed to learn WordPress?

Hello, I’m on the waiting list for coach training and I’ve heard Jody say a number of times on the Business Q & A call that the best thing to do while waiting is to start a blog. Since I’m starting from scratch I know to go right to WordPress. Getting a blog up and running will be my May goal (April is going so well that I want to keep up this monthly planning practice!) My questions are:

1. How many hours over the course of the month should I set aside to learn how to use WordPress (for blogging purposes)?

2. Do you have any particular ‘WordPress for Dummies’-type starting points you recommend?

Thank you! 🙂