The above will be the question most people ask when they think about starting practicing Tai Chi Chuan and rightfully so. Tai Chi Chuan is a comprehensive martial art which comprises of a multitude of elements.
The difficulty with Tai Chi Chuan is that the beginning may seem daunting because the art has so many different elements, form, internal skills like breathing and qi control, body mechanics, application and many more. The Practice area was created to help guide beginners on the path without losing interest and to introduce all aspects of Tai Chi Chuan gradually while practicing the form.
Luckily Kung Fu (Gong Fu) training has evolved from the traditional, life-long dedication that was required from a student, but it does not mean that we can forget the basics and foundations of our training. We all agree that you will never learn a language, unless you learn its alphabet first. It is just the same with Kung Fu. Therefore the real kung fu is obtained by practice, accumulation and study.
For the modern Tai Chi practitioner it is standard to start practicing the form as the basis of the training. From there it will be easier to introduce new elements like postures, principles, body mechanics, techniques and practices like neigong. During your practice you may study the theory with which the website can help you, as well as the books and even movies I recommend.