Wa'alaykum salam Islahuddin,
If you're signed up for the free trial, you have access to the first section of the course. Our courses are designed to be flexible but recommend listening to one or two Interactive Audio lessons and then one or two Language & Culture lessons as the lessons often relate to each other. Once you are relatively comfortable with the language, you can try using the games to solidify your learning and get more practice. If you buy the course you will have access to the Survival Kit lessons - try doing a few of these as you go. They aren't in any particular order but they have useful vocabulary like colors, days of the week, etc.
For extra practice, check out the "Practice" tab in the Interactive Audio lessons. You can also rate all your lessons using the My Level feature. I hope that helps!