To help you getting started easily Sam9000 comes with an existing project named "Misc. Projects"
Once you have successfully logged in, click on the Dash menu, on the top blue bar.
Unless you were already in your dashboard, you should now see My Kanban Today.
Click on + Task button, to the right of My Tasks Today.
This will bring the Create Task pop up.
Click OK after you named that Task in the bottom field.
You are done!
As an alternative, you could go to the project first. Click on Projects, it is the button in the top menu bar. This will bring you to the projects Kanban. Select the card of the project you want to work on. Then click Open. You are now in the project and you can use the + Task button.