Important lessons/features to learn and practice on TRIAL verison

Hello,

I recently created my adobe account. I am interested in learning Captivate, starting with trial version. 

Being a rookie I am unable of what features I should I start with to get hands-on. Hence I haven’t installed a trial version yet because I don’t want to lose out on crucial days (from those 30 days we get) while trying to find a traction.

What features are recommended to learn as the basics of Captivate? What are the concepts I need to learn as a beginner?

Thanks.