The usual way to submit a journal to a group is via the groups platform.
Therefor go to your group and click at the "Journal" tab, to get to the journals page. There you can find the "+ New Blog Entry" button at the top left .
If you click that you will get an empty form for your new journal entry. From there you can write down all the latest information, can choose the category it should be added to and can add a skin (Super Group status is required for that).
Once you have added all needed information, codes and did fill out the form correctly, you can now submit your journal.
Journals submitted via a group can not be added to the journal section of other groups. Only to their galleries.
Submit a Group Journal via Sta.sh
Go to Sta.sh and prepare the journal you want to submit. Write down all information and maybe add a