Calling Sub Channel Entries
You're close!

You select the author correctly with and assign it to the myEntry variable:

{% set myEntry = entry.authorTeamMember.first() %}


Now you just need to output the data from myEntry instead of entry.  i.e.

{% if entry.authorTeamMember|length %} 
    {% set myEntry = entry.authorTeamMember.first() %}

    {{ myEntry.authorName }}
    {{ myEntry.authorDescription }}
{% else %}
    &lt;p&gt;No Author&lt;/p&gt;
{% endif %}