Effectively using R is a journey of months or years. Still you don’t
have to be an expert to use R and you can start using and analyzing your
data with with about a day’s worth of training
It is important to understand how data are organized by R in a given
object type and how the mode of that type (e.g. numeric, character,
logical, etc.) will determine how R will operate on that data.
Working with vectors effectively prepares you for understanding how
data are organized in R.
It is easy to import data into R from tabular formats including
Excel. However, you still need to check that R has imported and
interpreted your data correctly
There are best practices for organizing your data (keeping it tidy)
and R is great for this
Base R has many useful functions for manipulating your data, but all
of R’s capabilities are greatly enhanced by software packages developed
by the community