Your dream is rich with symbolism and appears to reflect a mix of personal feelings, relationships, and broader concerns. Here’s a breakdown of some of the key elements:

1. Training for Something Unknown: This may symbolize feelings of uncertainty in your life or a situation where you feel unprepared. It could relate to personal or professional changes that you and those around you are navigating.
2. Evacuation from Earth: This could represent a desire to escape from stress or overwhelming situations in your life. It might indicate feelings of being trapped or needing to distance yourself from certain issues.
3. Family Refusal: Seeing your family refuse to join you could reflect feelings of isolation or conflict within your family dynamics. It might suggest that you feel disconnected from them or that they don't support your choices.
4. Friend's Actions: Your friend's involvement in destructive actions could point to feelings of betrayal or concern about the motivations of those close to you. It may also reflect your worries about the impact of others' decisions on your life.
5. Korean Names: This element might suggest a connection to your identity or heritage. It could indicate a feeling of being caught between two cultures or identities, experiencing a sense of belonging or alienation.
6. Destruction in Colorado: This imagery could symbolize fears of loss or destruction in your personal life or within your community. It may also reflect anxieties about larger societal issues.
7. Giant Space Apparatus and Swimming with Mermaids: The space apparatus could symbolize the unknown or uncontrollable forces in your life. Swimming with mermaids may represent a desire for escapism and the search for beauty or joy, even amidst chaos.

Overall, this dream appears to express deep-rooted anxieties, feelings of helplessness, and the need for connection. It’s essential to reflect on your current life situations and relationships. Consider discussing your feelings with trusted friends or family members to gain clarity and support. Engaging in self-care and finding ways to manage stress could also be beneficial.