If you are a first time artist, do not feel overwhelmed by the number of video lessons. Take your time… watch them in any order you choose. There is a general order to the videos in each category, so watching them in order may be helpful. You do not need to purchase anything — all the core fundamental teaching is covered in the free videos.
If you need personal guidance, please take advantage of the Draw Mix Paint Forum where I and many others can answer your questions. You can also just look around and see what other artists are up to including work-in-progress pics, studio setups, and much more.