Congratulations for the initiative. Given the target audience,I think that you should focus on compliance with Web Accessibility Guidelines https://en.m.wikipedia.org/wiki/Web_Content_Accessibility_Gu...

As a matter of fact, all websites should.

PS: there are tools that allow you to test the compliance. A list can be found here https://www.w3.org/WAI/ER/tools/

Another idea is to have web push notifications to notify the visitors about new opportunities.

In the US, ~29% of website visitors are using iOS notifications.

As web push notifications are not supported by iOS, we have launched Wise Notifications. It allows you to send notifications to your website visitors via the Wise Notifications App ( https://itunes.apple.com/lr/app/wise-notifications/id1448382... ).

For a smooth implementation, a WordPress plugin and API are available.