You can manage enquiries in one of two places, either in the course itself (viewable in the My Events section) or by clicking the burger menu (the three horizontal lines) at the top followed by "My Course Enquiries".
Step 1A (from course page only)
Click the "Enquiries" tab.
There are 3 levels to each enquiry.
1 - The course you have received enquiries for - you can then open this out further by clicking the expand arrow.
2 - Messages from interested candidates - this level will show how many potential candidates have sent enquiries which you can expand further.
3 - Message content
You then have two options:
1 - Reply to Candidate - send the candidate a message
2- Book Candidate - book the candidate on to the course