Welcome! I hope you receive what I'm going to say the way I'm hoping you will.
Sounds like her counter to your counter proposal was just to attend MC with you. This doesn't mean that she actually wants to work on things. It looks as though she's keeping the door open with her foot just because she can say "I'm in MC, what more do you want from me?" But at the same time, is not taking an active stance on reconciliation.
That being said, I'm afraid you're going to have to hear these words repeated ad nauseum: Back off and be patient.
While you're waiting, read as many books as you can on how to better yourself. You haven't mentioned, but have you read DR? Memorize it. Mars/Venus is also a good read, as are The 5 Love Languages and The Four Agreements. There are tons of excellent reads out there for you.
Even if she is depressed, I don't recommend suggesting this to her. You will be considered an enemy and she won't likely appreciate your armchair psychology. If the MC feels that she is clinically depressed, he or she will mention it.
So you said you know you need to make changes and wonder where to start.... Well, what are her chief complaints about you? Whatever she says the most often is the one you really want to work on.
For instance, my H hated my nasty temper. I have reformed, and will put 100% of my effort into not losing my temper when I feel threatened. It's made his reentry into my personal life much safer.
What do you think?
Betsey
"There are only 2 ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle."
