Thank you for the question. You may certainly do that with success.
The routine can then be the following:
Cleanser, soapfree, wash and rinse off.
Apply the Facial Moisturiser and leave on.
Cleanser, soapfree, was and rinse off.
Apply the Evening mask and keep on overnight, rinse off and add the Moisturising step.
We will gladly supply you with more steps once you are ready.