Hi @Jasmine84!
The error isn't about your metadata - it is about the command itself:
no such option: --m-metadata-column
It looks like you are running QIIME 2 2017.12, but you are running commands based on the 2018.2 docs. There was a major overhaul to metadata in that release, and many arguments were renamed.
I would recommend you upgrade to the latest and greatest release of QIIME 2 (2018.2), but if you can't, please change the selected version of the docs when viewing the docs at docs.qiime2.org, there is a little dropdown in the upper left corner, you can set this to 2017.12 to see that version of the docs. As well, on the CLI you can add --help to any command for the full list of options for each command.
Hope that helps! 