If you wanted to create a cute platformer in Unity however... then you might actually succeed.
I'd recommend Unity. I've been working with it for close to a year now and I've grown to like it. The free version comes with some basic assets and I'm pretty sure the pro version comes with more and better ones (though it's around $1000). Of course, you're not going to want to rely on premade assets, but there's enough there I think to play around with and get you started learning how everything works. http://www.3dbuzz.com/vbforum/sv_home.php has some pretty decent tutorials on Unity, plus an assortment of tutorials for other programs.
If you're serious about it, then that's awesome and I wish you all the best. But I tend to find that, from what I've seen (and experienced in one instance), these groups tend to work out along the lines of high school garage bands. Everyone talks about wanting to "make it big" but in the end most people just don't take it seriously enough and/or get bored and move onto different things when/if they find out how much effort is actually involved (algebra, geometry, drawing, writing, reading, etc etc etc).