This article documents how to create a schema through your browser. There are other methods for creating schemas such as queries as an example, which can be read about in the Snowflake documentation.
Log in to Snowflake if you have not already:
Set your role to the desired organization if you have not already:
Click Data
in your left-hand navigation menu:
Click the database name that corresponds with your organization:
Click the + Schema
button in the top-right of your browser:
Fill in the fields as you see fit and click Create
in the bottom-right: