Professional development  www.digitalmarketer.com and www.lynda.com for full paid training with certifications.

But remember the major platforms also have FREE training Google has Digital Garage https://learndigital.withgoogle.com/digitalgarage-au

 Facebook has Blueprint https://www.facebook.com/business/learn 

YouTube has Creator Academy https://creatoracademy.youtube.com/page/home 

Shopify has https://www.shopify.com/academy