Progress
:check: Finished intermediate r (Conditionals and Control Flows, Loops, Functions, Apply Fam, Useful functions)
:check: Finished tidyverse basic (Data wrangling, Data visualization, grouping and summarizing, more on ggplot2
:check: Importing data (flat files with utils, readr & data.table, excel data, deeper on excel with XLConnect, making database connection with DBI)