A recomended guide to vim - was {Re: Does bash have a tool ?}

[Richard Owlett <rowlett@cloud85.net>]

On 03/05/2018 04:27 AM, Richard Owlett wrote:
> On 03/04/2018 11:27 AM, Curt wrote:
> > On 2018-03-04, Richard Owlett <rowlett@cloud85.net> wrote:
> > > My eventual goal is to create a personalized FAQ.
> > > To that end I've collected all my outgoing mail which DOES NOT have
> > > "Re:" in the Subject into a single file {used standard SeaMonkey tools}.
> > >
> > > Using a text editor's search&replace function I've placed "KEY1" at the
> > > beginning of the body of each message. Similarly, I've placed "KEY2" at
> > > the end of each body.
> > >
> > > Searches led to <http://www.dsl.org/cookbook/cookbook_16.html> which
> > > describes tools to do word frequency tasks, primarily with bash 
> > > builtins.
> > >
> > > First I need to eliminate the irrelevant text between "KEY2" of the
> > > previous message and "KEY1" of the message of interest. It should be
> > > straight forard to do in BASIC.
> >
> > vim (hit escape to get into command mode)
> >
> > :/KEY2/+1;/KEY1/-1d
> >
> > will delete everything between KEY2 and KEY1, excluding the
> > matching lines.
>
> Haven't looked up the syntax you referenced. HOWEVER, an initial browse 
> of vim.org immediately led to a half dozen pages of interest which an 
> additional half dozen (at least) things that are inherent in vim that I 
> had not mentioned. As today should be chilly and damp, I suspect where I 
> will be warm, dry, and becoming educated.
>
> Thank you.
>
> [snip]

I've installed GVIM using Synaptic.
I have browsed vim.org but in the abundance of documentation I haven't 
appropriate introductory material aimed at my mindset - I learn by doing.

For example, GVIM launches with an unreadably small font.
I have found the instructions to do ":set guifont=*".
However I wish to set things appropriately in ~/.vimrc .
I ended up in <http://vimhelp.appspot.com/> a sample script to insert.
However I could find no links to how to find how find a list of 
designation of a font-face.

I've not yet parsed the example given me
> > > :/KEY2/+1;/KEY1/-1d

That may be longer relevant as my reading at vim.org has suggested 
better ways to approach my problem [ vim appears to have a world-view 
similar to Digital Equipment's TECO which I used ~40 years ago].

Where should I be looking for:
 1. how to parse the given example.
 2. how to have found it as a possible solution to my problem statement?

TIA