Add note on typescript

docs/getting-started/create-react-app.mdx

@@ -87,6 +87,16 @@ yarn add babel-loader@$VERSION --dev
 
 Then, running `yarn start` again should do the trick! ✨
 
+If you’re still seeing errors and you’re using TypeScript, then [this
+guide][typescript] might help.
+
+Finally, see [Support][] if you’re still running into problems.
+
 [cra]: https://github.com/facebook/create-react-app
 [loader]: https://github.com/mdx-js/mdx/tree/main/packages/loader
 [babel-loader]: https://webpack.js.org/loaders/babel-loader/
+
+<!-- To do: update to point to website if that’s working -->
+
+[typescript]: https://github.com/mdx-js/mdx/blob/main/docs/advanced/typescript.mdx
+[support]: https://mdxjs.com/support