Analogy time.
Level I is like working to become a fine athlete.
Level II is like working to become a fine caregiver.
Taking care of yourself makes you better equipped to help others. But helping others doesn't make you a better athlete. It may make you a better balanced and rounded person. Caring for others may also help you to care for yourself, which in turn allows you to make choices that result in become a better athlete.
They both advance your energy in different aspects of your whole self. The meditations in each are designed to help you advance in those aspects. It's an apples and oranges in a fruit salad kind of thing. Where the two together taste better than alone. Rather than you passed grade 1 now you can do the same thing at the grade 2 level of difficulty.
I find myself wondering in explaining the connections. Sometimes the seem direct and others indirect. It think that the connection and synergy is a very personal thing. You will find what you need to help you become balanced and opened, but what you find will be sometimes different and sometimes the same as what I find.
You are perfection.
Iam2