Timing

The past couple of days have been amazing. Reading The Christian Childbirth Handbook and The Nurturing Touch at Birth have really put an excitement in my heart for becoming a doula. However, I'm really struggling right now with the timing of it all. With everything else going on in my life, can I really add something else that will eat up my time? Will my children suffer if I'm gone even more at births? What about my marriage? I've already decided that when I do this it will be on a very limited basis....maybe one to two births per month. Also, I feel very strongly that this needs to be a ministry, not a business and I am currently working a retail job in the evenings once my husband is home to watch the kids, which doesn't mesh well with the unpredictibility of birth. Women will need me to commit to being available for them but I also want to be of good character at work and not start missing work all the time because I'm at a birth. So, it creates a bit of a quandry for me and I'm trying to figure out if God wants me to get all the details worked out first or if he wants me to step out in faith and trust him to work out all the details. Of course I want to trust him, but I also want to be responsible and not damage my reputation at my current job.