it's ok, calm down, lol, it takes some time, especially once you've worked with windows for a long time (terminals are not a bad thing, they are often more powerful and more reliable)
may i suggest using xine? search for xine on the net, go to their homepage, download the xinelib (the newest beta, it works extremelely well) and if u want a gui, install gxine (located on the same page)
to install, cd into the directories of those files and do
for both... install any dependencies u may come across, once you're done with both, run gxine in a terminal and up comes a gui with lots of features and fully capable of dvds, mpeg, etc.
*note: do not do the quick start intro thing in gxine, it doesn't work well, just skip it, this only appears the first time u start gxine