You will have understood this, your first few weeks determine your level in the company for the rest of your career.
To reach these levels you can either buy ready-made packs or buy for the corresponding number of VPs, or sell the products or a mixture of both.
When you register on the XOffice ARIIX (your personal space), you will have the opportunity to check the desired business level before going to the shopping cart. The system will then offer you packs equivalent to the desired level.
Note that it is possible to start without any pack, simply by purchasing your license and deciding to reach the business level you are aiming for by selling to your contacts at your own pace. But you could miss your goal of reaching the highest level as quickly as possible.