The best learning tool Vim can offer is certainly a :help command, as can be seen in the following screenshot:

It's an enormous collection of resources and tutorials which comes installed with Vim. Scroll through using the Page Up and Page Down keys (bonus point for using Ctrl + b and Ctrl + f respectively), there is a lot of useful information there.

Whenever you are stuck, or want to learn more about a particular command, try searching it using :help (you can shorten it to :h). Let's try searching for a cc command we've learned :

:h cc

Help tells us the way the command works, as well as how different options and settings affect the command (for instance autoindent setting preserves the indentation).

:help is a command which navigates a set of help files. As you look through the help files, you'll notice that certain words are highlighted in color. These are tags, and can be searched for using the :help command. Unfortunately, not every tag name is intuitive. For instance, if we wanted to learn how to search for a string in Vim, we could try using the following:

:h search

However, it looks like this command takes us to the entry on expression evaluation, which is not exactly what we were looking for, as demonstrated by the following screenshot:

To find the right entry, type in :h search (don't hit Enter yet) followed by Ctrl + d. This will give you a list of help tags containing the substring search. One of the options shown is search-commands which is what we'd be looking for. Complete your command in the following way to get to the entry we were looking for:

:h search-commands

The following display shows the right help entry for search:

Don't forget to use Vim's help system any time you have questions or want to better understand the way Vim behaves.