There are so many different career opportunities within education and I hope you find a path that works well for you! As a former high school math teacher, I can tell you that teaching was an incredibly rewarding career and I miss it often. To answer your questions, here are a few other ways to be involved with English education beyond teaching:
(1) You can work as a private tutor or at a tutoring company that helps students with English content.
(2) You can work for an organization that develops English curriculum (for instance, textbook companies or companies that create SAT/ACT study materials).
(3) You could work at an education company in a business or technical function. For instance, you could do sales, marketing, support, finance, or be an engineer!
I would suggest that you start by looking online for companies and organizations that might interest you so you can do a little more research. That will help you determine whether or not you think teaching is the right path for you.