DMAIC is not a good fit for every situation. First, you need to recognize if the problem can be solved with the DMAIC.
Lean Thinking - the Temple Of Lean
Lean thinking helps to reflect on the work, product, and possible improvements. The goal is to deliver a product.
Minimum Viable Product
Start with MVP poster. Minimum Viable Product is the core of your product which can provide enough functionality to observe the user behavior.