Many students have already made comments on the blog posts, which then appear on the blog for others to see and respond to. You don’t have to do this, but I’d very much welcome additional reactions. Just be aware that the comments will be fully public, whereas your posts on the Moodle forum are private to the class.
You may be interested in saying more than fits into a comment. If you’d like, we could post those on the blog as full entries with your byline. For example, you could present your poster for the Create assignment, or a summary of your Investigate with a link to the full report. Again, this is just an option to consider. Remember that posts are fully public, which could be useful if you want to share the link with a community group or your own organization.