Do you mind my asking what happened that has you saying that medicine is your passion? I have to say, the split second "I just realized medicine is my passion!" type of posts always confuse me quite a bit. For me personally, this journey started from the realization that finance was not going to be a meaningful enough career for me. That led me to consider alternatives that would suit my attributes and ideals. Then eventually I said to myself "hey, medicine fits the bill pretty darn well. I wonder if I have what it takes." Took some premed classes and blew them away, enjoying the journey as I went. Then i realized that all that told me is that I would be good at and enjoy a career in the sciences. So I started getting my clinical experience, and even then, at first, I wasn't enamored. It took a couple months of getting to know patients, their stories, and witnessing their inner fortitude and the role of a physician in that context before I was finally able to sit down and say to myself "This is it. This is what I want to spend my life doing." We'll call it "informed passion." Thats where you want to get to before you start sending your life into an enormous upheaval that may just leave you with a pile of student debt and the realization that medicine wasn't quite right for you.
So, my suggested step 1 (different from my own path) is go shadow a physician for a bit to make sure. While you're doing that, you can start learning about all the hurdles (admissions process, the pace of med school, residency, etc) you'll have to pass, and the difficulty and commitment required of the task in front of you. At that point, if you're attitude is still gun-ho med school, you will find that the people on this site will become an unbelievably supportive and helpful group full of experience and wisdom that will help take you to where you need to be. As some of us are older, there's just a certain amount of hesitation that I for one have about sending someone straight into the front lines without them truly comprehending the realities of the struggle ahead. Hopefully that will help you understand why you didn't just get more of the "Congrats! Rock it, man! You'll knock em all dead" type of comments you were likely expecting.
cj8