I would like to know which books I should read to understand the paper "The local Langlands correspondence for $\mathrm{GL}_n$ over $p$-adic fields" written by Peter Scholze.
I only know mathematics subjects at the master's degree level. I also learned about representation theory of finite groups.
Next year I will probably start my PhD in Lie theory but I'd like to read the above article as a personal project.
EDIT:
I found a good article that shows the necessary prerequisites to get a glimpse of the Langlands Program and I want to share it: Prerequisites for the Langlands Program.