Adopting BRSE is no different than adopting Agile, DevOps or any other set of best practices which have learning curve, require changes in roles, processes, tools. It's a marathon and it should be carefully planned, communicated and "sold" to decision makers and impacted stakeholders and neighboring business functions.
Mindset is a good start: cultivating particular values
A template of the plan is coming.. also check suggested steps at the end of each chapter
Lots of preparations and planning
Setting up a new team as per this topic
In the meantime please see these articles [1] [2]. Some of them don't even mention BRSE, because, you've guessed it, they had bee written prior to the inception of the label. Actually, I used label "i1" instead. Regardless, the content is written by one person (me) thus the approach is the same, just gets more details.