An answer to is Kabbalah only for Judaism
Yes absorb what light you can and yes it may be qualitatively different in terms of your understanding and ability to share this light. It is the quality of sharing that light that demonstrates your understanding of the light you are "taking." Think of sharing as transmitting-sending. When you succeed in sharing that light another connection is made thereby increasing so to speak the throughput for that light making it contain more information, just as when the throughput for an Internet connection is widened through a T1 or cable line enabling faster speed of transmission and the ability to carry more data to more places. Case in point is your question which will now through this answer demonstrate the answer to your question which is that it isn't your "religious background" that matters here in terms of Kabbalah, but your willingness to be open to what Kabbalah can teach you through opening up your soul-being to becoming a light connection.