If you really want to learn, I'd suggest not using anything for a while other than your camera, your subject and your eyes. Plenty of stunning portraits have been shot in available light with nothing more. Learn to evaluate the existing light illuminating her face. Watch were the shadows fall, how her eyes look - are they well lit and alive, or deep in shadow and lifeless, and whether the background compliments her pose or is a distracting, confusing mess. There's plenty of good advice in this thread, but I'd recommend keeping it simple and mastering a bit of the basics first. Also, shoot a lot, and try to make every pose and lighting setup different. Backlight, sidelight, butterfly, low angle, high angle, profile, tight head crop, 3/4 figure, leaning forward, back . . . you get the idea. Avoid the temptation to take bunch of shots of very subtle variations. Get the big picture first to see what obviously works, what doesn't, and what just need refining. Good luck! Looking forward to seeing the results. ps here's one or two I shot with the same hasselblad and 80mm setup you have and nothing else. They are just scans from old contact sheets, not finished prints -