Dreams involving spirits or entities can often represent aspects of yourself or your subconscious that you're exploring. In your dream, the teenage setting and the experience of having your first legal alcoholic drinks might symbolize a transition into adulthood or a newfound freedom and responsibility. This can reflect feelings of nostalgia or a desire to reconnect with a more carefree time in your life.

The spirit in your dream, who seems friendly and interested in getting to know you, could represent a part of yourself that is seeking understanding or validation. It might also symbolize creativity, intuition, or a deeper aspect of your personality that you’re beginning to acknowledge.

The appearance of your father figure could indicate authority or guidance in your life. His act of revealing the spirit’s true name might suggest a confrontation with truths or aspects of your identity that you’re still coming to grips with. The idea that the spirit was in danger when your father entered could imply a fear of losing this connection to your deeper self or creativity when faced with external expectations or authority figures.

Helping the spirit escape could symbolize your desire to protect your individuality or the more vulnerable aspects of yourself from external pressures. Closing the window and blinds might indicate a need for privacy or a desire to keep certain parts of your life hidden from others.

Overall, this dream may suggest that you're navigating your identity and the balance between your social life, personal freedom, and familial expectations. It could be beneficial to reflect on any recent changes or challenges in your life that relate to these themes, and consider how you can honor both your individuality and the guiding influences around you.