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
Essential Grammar Foundations
Module 2
Reading Skills: Speed and Comprehension
Module 3
Listening for Specifics
Module 5
Writing Task 2: Structuring Opinion Essays
Module 6
Speaking Part 1: Foundations and Fluency
Module 7
Speaking Parts 2 & 3: Development and Discussion
Module 8