The EQ Client is proprietary and cannot be handed out. However, you should be able to find Everquest: Titanium fairly easily if you ask your friends. Once you have the default Everquest: Titanium, edit it per
these instructions. You should now be able to play on Project1999.
Then I suggest you check out the
Technical Discussion forum for optimizing Everquest. In there you will find UIs, guides to shrink your Everquest: Titanium directory to just the bare essentials for P99, and guides to enable/disable Luclin models, Velious armors, and more!
As far as classes, necros and shaman both solo effectively, but shaman are more item dependant at lower levels than necromancers (making necros superior for the untwinked newbie). Good luck, and welcome to our world now!