I guess I could've been a little more descriptive..A good sensor, fast glass, steady hands, a good flash and a tripod. Or any combination thereof.
What is the occasion ? How close/far will your subjects be ? What type of quality image are you after (eg how much noise is acceptable) ?
Well said usayit.Keep it simple. Also recall that you have a triangle; ISO, Aperture, Shutter speed. My personal choice is to maintain a shutter speed I know can reasonably stop subtle motion and handshake. Grain from higher ISO, I can work. Shallower DOF from faster aperture I can work via composition. Blurry pictures... no can do. A clean, noiseless, well composed photo will still fail if the subject is blurry (unless intended) from motion or handshake.
Learn the basics, keep it simple at first, then experiment with complex setups. I'd start out working experiments at home without the pressure of actually producing something with artistic merit. Heck, I've used lamps, ipads, flashlights, etc.. doesn't necessarily have to be a strobe although a strobe is a popular lighting source for a good reason. The nice thing about digital is the instant feedback really makes the learning process via experimentation fairly interesting.And usayit, I would love to start learning a little bit about flash. That's probably the one thing I know NOTHING about I photography.