Finding a compatible and competent partner would be ideal, but thats not always easy. Probably not the recommendation of everyone here, but a "class"/climb with a guide wouldn't be a bad thing. IMG obtained part of the Rainier concession for 07, and they are a good group. Good luck.
First is some classes...With Mt. Rainier close, I thought it best to summit that a few (more than 3) times before even THINKING about anything bigger...
Any suggestions on how to get the equipment started, or what classes you think are best, etc...would be great.