I'm not a big fan of anything used either. Just buy quality.
That said, YOU DO NOT NEED LOTS OF MONEY FOR PHOTOGRAPHY
leave that attitude to the gadget-heads.
Photography can be about seeing a moment from a specific perspective inside your head and capturing it to share with the world. Although new lenses and equipment will help you do that, you must "SEE" first.
A creative and dedicated photographer with a mediocre body and lens that knows how to maintenance his camera will outshoot an idiot with $20k worth of equipment that spends so much time researching the latest lens and "deciding" which piece of equipment he "needs" for his shooting, HE'S NOT ACTUALLY SHOOTING ANYTHING!
After you've taken about 60-70k shots, you will develop a feel for what works for you and what lenses/equipment you will want to direct your money towards. Don't spend all your money on equipment when you can work less and shoot more by not spending that money.
Volunteer to do photography for people. They can't whine if you screw up because you're doing it for free. It's fun and gives you interesting subjects and new locations.
Post your work up on different sites. Let people rip into them and glean what you can, just don't take anything personally. It's just their OPINION. If you like it, don't change it. I've learned so much from people making fun of my work.
I started off doing fast, sports work. After showing off my stuff to different clients and friends, I was appalled to learn that almost EVERYONE said my portraiture portfolio was awesome and that I should focus on that. I disagreed, but started putting more effort in that direction anyway. I think they're right now.
Have fun. It's a journey. Don't let gadget geeks market to you and tell you that you need any more than a clean lens and a keen eye to enjoy and develop yourself as a photographer.
good luck to you,
Sean
oh, and if you like people pictures:
50mm/1.8 is less than $100 and is pretty good for lower light. In good light, the pics are stunning for the price of the lens IMHO