Continuation of the song:

First thing first
The phrase "first thing first" is a common expression that emphasizes the importance of prioritizing tasks or actions. In the context of a song, it could suggest starting with the most important or urgent matters.

I am saying all over things
This line could imply that the speaker is addressing various topics or expressing many thoughts or feelings. It may indicate a sense of openness or willingness to communicate openly.

Can you please continue this song?
Asking the listener to continue the song could be an invitation for them to join in or participate in the musical experience. It could create a sense of collaboration or shared creativity.

Explanation:
The song appears to be setting the stage for a conversation or exchange of ideas. The speaker is starting by acknowledging the importance of addressing key matters first before delving into a range of topics. By inviting others to continue the song, there is a sense of inclusivity and engagement with the audience.
In summary, the lyrics seem to be about initiating a dialogue or interaction, possibly in a musical or expressive way. The phrase "first thing first" sets the tone for prioritization, while the invitation to continue the song invites participation and shared expression.