Before creating your profile you can follow other users and look at their work. Plotagon's huge community is basically a big social network centered on movies and short films. Once you've found projects that interest you, you can start creating your own.
When you start your own project, you can either create your own characters and sets one by one, or use the ones that come with the program. If you choose the first option, the program will give you basic shapes that you can add details to. To use these creations in other projects, give them a name and save them to your gallery. The second step is as easy as the first. Once all your characters and sets are ready, you just have to make them move and talk. To do that, you'll be able to choose from a long list of movements and interactions that you can apply to your characters.
When your project is finished, you can upload it to your social networks and to Plotagon, adding all the tags that apply. Your friends can tell you what they think, just like on Facebook. All the 3D films you make will be saved to your gallery so you can watch them whenever you want.