Since you have the server version you could create a user macro like below and then you could just use the editor like normal to put in the comments. One you create the user macro you will be able to put in a comment macro that will only show in edit mode.
Macro Body Processing:
Hi my Community friends! For those who don't know me, I'm a product marketer on the Confluence Cloud team - nice to meet you! For those of you who do, you know that I've been all up in your Co...
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