I’ve been using R since 2006. That predates RStudio and the tidyverse. I remember the struggle of keeping track of the variants of apply and often fiddling with them to get code to work.
Then came plyr and the dplyr and my life has never been the same. The major verbs of dplyr include select, filter, mutate, group_by, summarise, and arrange; and if you are doing data analysis in R then you should be fluent in them.