Step 1: Set it up
First, set up the team in small, cross-functional groups, if possible. The groups should be matching the requirements of the process and retain some level of autonomy. Also, decide on an iteration's length and its necessity in general. The iteration should correspond to the nature of the work, the product vision, the available resources and the set success criteria - it will have an impact on the speed of work.
Step 2: Plan it
Prepare a set of policies - a strategy - that the entire team will be familiar with, to ensure that you are all on the same page and have access to the big picture - this will make the team better motivated and better prepared to work in a way that will suit the demand.