Due to other pressing commitments, I'm no longer teaching writing online. My best suggestion is to read my short book on memoir writing (on the right), which will provide
all the info you need to start writing your memoir.
You can also search online for local writing groups, or look for a writing class at a community college or adult ed program near you.
If you prefer an online class, check out GrubStreet, Inc. in Boston. They have a great reputation, and quite a few in-depth online writing classes.
Best of luck with your writing!