Hello! I am starting on the Data Engineer track, and was wondering what areas might be useful to dig deeper into outside of Dataquest? My understanding is that the track will give you the core skills needed for the job, but I want to try to further boost my skills (and resume) outside of it.
my recommendation: do first the DE track and concentrate on the materials.
After that you will have a deeper understanding of things missings and gaps you want to fill with courses/tutorials outside of DQ.