when you are trying to install these, are you going to the site that is hosting the software or installing it through the package manager? (in other words, downloading a .tgz from a site or doing an apt-get?) Before you get to far along, go into the menu bar, get to the system administration menu, and look for the synaptic package manager. This is a GUI front end that will help you find stuff to install. Do searches for the software you are looking for. About 50% of it will already be supported in there. For a pampered Windows type this is as close as you'll get to point and click. For everything else, do a google search on "Ubuntu install [software x]" The community is really good about posting guides for most things.
CISSP, CISM, CISA, GCIH, GREM, CEH, HMFIC, KTHXBIROFLCOPTER