Hi CJ,
Congratulations on being infected by the farming bug

It's pretty infectious these days. Here are my thoughts on your situation:
First of all, you definitely don't need land to start farming. It's actually better when you're just starting out--especially if you're not 100% sure that you actually want to farm--if you can lease land instead of owning it.
Experience is probably the most important thing. I would focus on finding or creating opportunities to get your hands dirty while also reading everything you can about growing veggies. Can you get a plot at a community garden to get started growing for yourself? Can you plant some containers with veggies wherever you live? Or, depending on your family/work situation, can you take a summer internship with a nearby farmer?
Then, once you have a bit of production experience, if you still want to grow into a market-scale operation, start to think about the business side of things. The Beginning Farmer website at
http://beginningfarmers.cce.cornell.edu has a series of lessons that you can work through to start thinking about goals, marketing, pricing, regulations and other business considerations. The site also has articles on successful farmers, links to the Cornell Small Farms Program for production information, and information about workshops, farm internships, and more.
Hope this helps. Good luck, CJ!
Cheers,
Erica