What version of Sonar are you using?
What type of music or sound do you love, or want to play to practice?
What you need is a good quick beginners tutorial of how to make sounds within Sonar.. (I'll get to that later.)
I bought the Groove3 Sonar Explained
video tutorial which helped a lot to understand Sonar Professional out of the box.
I've also spent time watching quite a few online tutorials and videos on YouTube, which have certainly helped get inspired and motivated (and rather excited).
A few years ago when playing with Sonar trials, I watched Learning Sonar X2 with Garrick Chow
As soon as I came across some sounds I loved hearing in Synths - I quickly appreciated the Piano Roll view and how simple it is to paint in notes.
When I came across drum sounds (or other sounds) I liked - I learned how cool the Step Sequencer is.
What I'd like to see more on YouTube is quick beginner guides that focus on getting sound out, without worrying what the sound or results are like. Beginners just want to make a sound. It's motivation they need. It's then up to them to choose or make better sounds.