Reading direction and rules
Manga originates from Japan, and Japanese traditionally reads vertically from top-to-bottom before going right-to-left. So for any manga originally published in Japanese, you start reading from the top right corner and finish in the bottom left. If it’s been translated into English, you’ll often find it remains this way. But if you’re writing in English from the start, there’s no need to do this, so it’s up to you! Decide on your reading direction and stick to it.