Questions about uploading a score.

I finished an arrangement of a piece of classical music that I would like to share.

Unfortunately, I found the upload process to require information that I was not prepared to answer, with no detailed guidance in the documentation.

Here are questions that I have from reviewing the initial upload page (there may be more to follow):

I do not know what to choose from the "Instrumentation" drop-down box.
This is a piece for Flute solo (or other C instrument) with Easy Piano accompaniment. I did not see anything close to that in the drop-down choices.

I do not know what to choose from the "License" drop-down box. I do not know anything about licensing, and guidance would be appreciated.

I do not know if there are a standard set of tags, or if one just makes them up on the fly. Obviously, I want the appropriate, interested people to find this score when searching.

Are there any guidelines for what should be included or not in the description?

I was disappointed that these questions were not answered up front in the MuseScore online manual.

I suspect that subsequent screens will raise additional questions.

Thank you in advance for your clarification, and I hope that the answers will find their way into the MuseScore manual, also.

Regards,
David D.