Hi there, @louiserward ...
I think this this would depend on where you want to post your introduction message to your students in your course. Probably the easiest way to do this would be to post an announcement to your students introducing yourself. And, if you want, you can enable comments so that people could reply to your announcement. How do I add an announcement in a course? - Instructure Community
Or, another way you could do this is to post a new discussion topic in your course called "Introductions". Then, you would be able to introduce yourself in the body of that introduction text. This would also give your students a way to post a reply back (similar to if you enabled commenting on announcements). How do I create a discussion as an instructor? - Instructure Community
Do you think either of these options might work for your needs? Keep us posted...thanks!
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