Hi Christie,
I was sort of in your situation not long ago.
I don't know if you are the type that can read for long stretches at the computer or not, but if you don't mind spending a little money on a book, Wiley puts out a book called "Canon EOS Digital Rebel" that also covers the XT by Charlotte K. Lowrie. I read that book through with my camera by my side and when she would talk about certain features, I would access them right then and there.
Also, the manual that came with your camera is good, but the book is a little more personal. I felt it helped me.
As far as the strobes go, you'll need to learn how your camera works first. So read your manual and/or that book. And Ronnie's advice helped me not too long ago. I just got a flash meter today, and I think it will be handy, but since you are shooting digital, it is not totally necessary. You can watch the histogram and look at the images you capture to get an idea of where you are. You'll just have to spend more time trying different things and playing around.
I was really new too and had to ask very basic questions about the strobes. But here is what made sense to me. You set your camera to a specific aperature to get the depth of field you are looking for, then you adjust the power on your strobes to get the exposure right. You can use a flash meter to tell you that, or, you can just take some shots and adjust. The shutter speed is sort of irrelavent because the flash of the strobes is what captures your picture. There are exceptions to that, of course, but I think that is more advanced photography.
When you take a shot with the digital rebel and then look at the picture on the screen, if there are white areas that sort of blink at you, that means those areas are blown highlights, meaning you had too much light. Sometimes you want that (like if you are doing product shots on a white background), but usually you don't want any blinking areas on the picture. Either increase the aperature number setting on the camera, or reduce the power of your strobes.
But first, read your manual and/or a book about your camera. Do it with your camera in front of you and actually go through the motions that the manual/book describes. It really helped me.
Good luck!
Curtis
P.S. I bought two Alien Bees strobe lights (
www.alienbees.com) they were highly recommended on this forum and since I've been using them the past couple of weeks, I have to agree, they are really helping my studio photography to look more towards professional quality.