Short answer: YES! You are welcome to immerse yourself in this experience of deep meditation for your personal development and journey.
To receive credit towards KRI Level 2 certification you must hold a KRI Level 1 certificate. If you do not yet have a Level 1 KRI certificate you can still take the course. You can apply one Level 2 module before you complete the KRI Level 1 course and still have it count towards your Level 2 certification.
If you take more than one Level 2 module before completing your KRI Level 1 program, you will not receive a letter of completion, and hence they will not “count” towards your eventual Level Two certification.