I understand the anticipation, but the academies are really focused on completing the class of 2021. They have reviewed your self-submitted scores and believe that you may have the background to be admitted. It is just a broad look that says they will let you start the process. When the Class of 2021 enters this summer, the application portal will open to those for the Class of 2022. This will be the real start of the process. You will have many task on the portal to complete and get your information submitted.
In terms of nominations, you should go to each of your MOCs website and understand what they want. There process starts usually early in your senior year. 99.9% of the time they will want letters of recommendation so it would be good to start identifying who you may ask now.
This is a marathon and not a sprint. Pace yourself and keep doing your best.