Someone wanted to learn this too, so Grasp built them a personal learning path.
You can keep exploring this one or create a path like this one shaped around you.
Recommended resources
Module 1
Foundations of Digital Marketing
Module 2
Website & Landing Page Essentials
Module 3
Content Marketing Fundamentals
Module 4
Search Engine Optimization (SEO)
Module 5
Social Media Marketing
Module 6
Paid Search Advertising (PPC)
Module 7
Paid Social Media Advertising
Module 8
Email Marketing & Automation
Module 9
Analytics & Performance Measurement
Module 10