Welcome to the wacky world of DSLRs!
I understand the "overload" feeling, but it doesn't have to be totally overwhelming.
There is a wealth of information in this forum. I'd start with reading the "sticky notes" on the top of the various sections here. There is information on everything from achieving good exposures to successful post-processing.
I'd also start a library that encompasses both general photography and specific fields that you might be interested in, and seriously read and practice. If you have a good bookstore nearby, or a camera store that has a good book section, make a habit of stopping there regularly. One good "beginner" book is Understanding Exposure by Bryan Peterson, which helps put together your various settings for best results.
Canon has some good tutorials on their site. You can find them here
. There are also many other online photography resources that, as you go, may be useful.
You will find that using your camera will lead to failures, which are learning experiences! Each of your shots will help you to learn about what you've done wrong or what you've done right. DSLRs give you real control of your photography, but you need to pay attention to what is going on. Of course, you can stay in fully automatic mode and have an expensive Point and Shoot, but it sounds like you are trying to be more creative, which calls for patience, understanding, and practice.
Also, read your camera manual carefully and completely!
And, good luck and have fun!