This is the thread to start you off with
http://androidforums.com/galaxy-pre...turn-phone-stock-factory-updated-11-09-a.html. You don't need a sd card reader in your computer(though having one does help). All the mods available just require you have the USB cable that came with your charger. You may also need samsung's drivers in order for your computer to recognize your phone.
This thread
http://androidforums.com/galaxy-pre...od-v5-0-2-6-file-system-recovery-utility.html is for Clockwork Mod which is a custom recovery that allows you to create your own back-ups. With these two powerful programs you can literally do whatever you want with your phone without fear of losing what you previously had on it.
Regarding Titanium Backup, you really only need that to back up your apps for quick restoring. Once you get CWM on your phone you won't necessarily need to back up your apps constantly. Considering that it saves an exact mirror image of your phone.
P.S. If you have any questions make sure you fully read those threads. You question has more than likely already been asked if any issues arise.