You will have so much fun with Gloria, she's nuts, in a great way.
My doula training is 28 weeks long (1 3hr class a week, 2 shadowed births 3 independant, neonatal recuss etc.) Most of us are hoping to go onto be midwives.
Our class is geared towards our particular situation here in Montreal, the assumptions being that:
We will be working in busy hospitals that are severely understaffed and clients will be underserviced and undermonitored
our clients will mostly be in the hospitals
Many of our clients will have wanted midwife assisted births but without the option(we have VERY few midwives in Montreal and huge legal restrictions on practice here)
We learn in detail; the physiology of childbirth, pain coping techniques, nutrition, emotional issues, their effect on birth, resolving emotional issues, signs of problems in pregnancy, normal ailments of pregnancy and how to safely and naturally alleviate them, signs problems in labour and birth, hospital proceedures, how to do things like; read fetal monitors; understand Blood pressure, diagnostic tests etc., we see ourselves as the first line of defence agains PreEclampsia, unneccesary induction, misjudged duedates, ect.
DONA would say we are completely out of line but we are doing what people need, and are educated to do it. I believe I prevented a C-section yesterday/today by turning a breech baby with homeopathics and visualization, so as far as I am concerned someone has to do this work and doulas are the ones to do it.
But that was a tangent. What I am saying is that it depends on who your clients are, and what the needs of your area is. If you are dealing with people who are horrified of hospitals, trying to have natural birth, wish they were having a midwife assisted birth, and are in a less than ideal hospital setting, they need more help to have that natural birth. If they are empowered homebirthers they probably just need you to hold their hand and put pressure on their lower back, and tell them they are awesome. Gloria and DONA will do that, Gloria will do it better. damn well, and she'll wash all of those silly 'stages of labour' and 'this is birth and the positions you should use' ideas out of your head if they are there.
Congrats, I hope you love doulaing.
And indeed the best learning happens at births. I just had my first long difficult birth and did I ever learn from this one! (3 days in hopsital, but with great result)