The easiest way to find out is going to this website. Here, you will also find images and a video that explain the creation process.
However, we also put together a short overview for you here:
In order to create something with CoSpaces, you need a laptop or computer and the newest version of Google Chrome, Firefox or Safari.
Go to https://cospaces.io/ and use the button in the upper right-hand corner to “Sign up” if you don’t have an account yet. Otherwise, you just use the “Login” button.
You will be taken to the creation studio. Get started by clicking “Create space”. Now, you will find yourself facing an empty stage that is just waiting to be designed. Click the white cog to open the stage settings and adapt the environment of your space. The white cube symbol will take you to the object library. From here, you can drag and drop objects, text markers or images to your stage. To individually adapt the items you placed on the stage, double-click on them and use the menu that appears to, for example, change the color of an object.