I've spent the last
three years just reading these forums because I didn't really have time (until recently) to really use Sonar. Sonar is so deep that I've learned something new
every single day since I signed up back in August 2012. I'm more into Sonar as a supersynth/sonic space creator than as a studio recording mechanism, but Sonar is both and in my case both are needed.
Sonar is complex enough that you can't really just use it to throw something quickly together. Once you're used to it things seem simple enough, but there's a lot of head scratching at the beginning. I came to Sonar from Kinetic I, Cakewalk's very much simplified environment (back in the day), and even that required quite a bit of learning.
All that to say that yes, Sonar is daunting for quite a while, but boy is it worth it once you start to feel comfortable with it. You have to do everything yourself as nothing is given up front, but the result is something that
you created, something uniquely
yours.
I encourage you to not feel discouraged since the reward for taking the time to learn what's going on will bring you to a place where you'll wonder what you hoped to do with Garage Band. One hour a day is a good place to start, but it has to be for way more than a week. A year would be a good place to ask yourself where you're at.