If you don't even have a camera yet, it's premature to be talking about photographing models. Look at your budget, read camera reviews and find something you think you'll like and can afford. Canon and Nikon are the two big dogs so start there. If you have friends who are into photography, ask to see their cameras. Ask questions about specific camera models once you've gotten it narrowed down to 2 or 3. Then learn your camera. Learn about lighting, exposure and depth of field. Learn how to shoot in manual. Study composition, rule of thirds, leading lines and so on.
When you've outgrown your kit lens (which doesn't have to take long), you can start looking at better lenses, off camera lighting and other equipment. Again, these things can get expensive (esp lenses) so you have to know your budget.
Read and practice and take pictures of whatever will sit still long enough while you fine tune your skills. Good photography is combination of technical skill and artistry. These take time to develop.