The new DataCamp course, Machine Learning in the Tidyverse, is both excellent and makes extensive use of list-columns! Even if you don't have a DataCamp membership, the first chapter is available for free and could be a good place to start. From the description of Chapter 1:
This chapter will introduce you to the backbone of machine learning in the tidyverse, the List Column Workflow (LCW). The LCW will empower you to work with many models in one dataframe.