I cannot figure out how to create a post which shows up in the charms section of d2. Any help would be appreciated.

Pick from here, depends where you play Ladder, Non Ladder etc

And just make a topic of what you are trying to sale: https://forums.d2jsp.org/forum.php?f=384

Judging from your recent topics you play Ladder which is here: https://forums.d2jsp.org/forum.php?f=271

ah, I guess it just gets sorted in the charms section. thanks for your reply!