Well, there's Harvest Crittenden of course! And a new FB calligraphy friend is a Michigan native, though she's in Napa now, Jp Panter. Erica sent me a link to the website of another Michigan calligrapher, Taylor Barton of "t.ink cursive". And Molly Jacques, she's from MI too.
I don't think you should be shy to join a guild! Calligraphy people are so welcoming and generous. I think it's right now, at the very beginning, that good help and instruction are indispensable! I am completely self-taught (though I took one lettering class from Harvest online, this year). I would have LOVED to be able to join a guild and participate in classes.