All I talked about are the traditional ways to get published in Japan. The ways that mangaka there usually get started. But if you don’t want to go to Japan, then there are plenty of other things that you can do! You can submit to an English-language publisher (Sparkler Monthly and Image comics both take submissions), or you can publish it yourself and sell it at a convention, or sell it online, or even just put it up as a webcomic, like Megatokyo did! There are a ton of ways that you can go, and it’s up to you to decide the best one for you!