So the basic thing you need to start working with org-mode is to install org-mode. Emacs > 24.??? already have it bundled and if you're not going to use some cool features like org-drill and stuff, that should be enough.
Basically, org-mode operates with org files. Create one (work.org
for example). Org files' markup is simple -- there are headers
with info. Header format is '*'{1..} TODO-kw Description
. To
create entry just write it. Also C-c RET
does something similar
(I never use it tho). So, stars are indentation -- more indented