There are many ways of getting a full screen help menu. The simplest
way I can think of is to open "help" in a new tab:
:tab help
Then u can use commands 'gt' ('gT' for backward) to switch between tabs.
> The problem I currently have in the very beginning of using vim is
> that I even dont know for what to search in the help files (or google
> or whatever).
One of the best vim features is that when you want to look up
something but you don't know where to start from, type:
:h <any word relate to ur search topic>
then press <Ctrl-d> while u are still in the command line. Vim will
return all the topics related to that word. Just try it and it's cool.
:)
HTH