Hi!
The easiest editor to use would probably be "pico" all the useful commands can be found in the bottom two lines of the screen at any given time.
True. OTOH, nano is a pico clone which works faster and which doesn't have a weird license: http://www.nano-editor.org/. The SRPM installs cleanly when using "rpm --rebuild nano[].src.rpm". I use it on all my systems.
(*IMP* But it doesn't handle long lines very well.. if a line exceeds 80 characters it breaks it into two lines and that can totally fsck up your configuration file.)
Don't know about pico, but nano allows you to issue M-w (Metakey followed by a "w"), which toggles word-wrapping. Metakey most of the time is either Alt or Esc key.
One word of advice ... always make a copy of the file that you are going to edit..so even if you do something wrong... you can always restore your system to the last working state.
Sound advice... Nico :-)