Newbie starting eLearning series; Templates

I am leading an effort to do the following:

• Create a style guide for eLearning design and development for training on and  salesforce and subsequent implementation.  (done)
• Create three types of eLearning templates in Storyline to create:
  • demo 
  • try it
  • test it
• Getting started is the hardest!  I have a semi-template design idea and we have our guidelines, but are there best practices to creating standard templates that will be replicated for the many 'steps/processes' our learners will need to learn, do and test out.  
• We will have end-users who will use these eLearnings as pre-work.  They have to test out to move onto the next eLearning and then the in-person training. 

Thank you for helping get us started!