Hi Kalani! Your profile will be shown on the language partners page automatically. Make sure that under settings>privacy>follwer requests, the box next to "Profile is visible on the language partner search page" is checked. So that when someone searches for a (native) speaker of your native language, who is learning any of the languages you're learning, your profile will be one of the search results.

So in your case, someone who searches for a native English speaker learning Japanese, for example, will be able to see your profile as one of the options in the search results.