Do not submit cards made by others unless you have clear permission to post and modify said card(s).
Due to change to card effects that could happen during BT session of said card(s) it is required that you are able to modify the card as needed. Which is something that's not so much possible to do if the card(s) or image is from another person.
However if you *are* the creator of these cards, please look at the post made by others to get a proper example of how a post should be made. Or you could ask us in discord ^^;