X1 was said to have a few bugs and X3e was the most stable version of all the X series so far.
I would recommend upgrading to Sonar Professional. Your cost would be only $99 and it's all you need when starting out. There's only a few fancy plug ins and toy's missing that Platinum includes. You can always upgrade later.
Knowing X1 had issues would be enough for me to spend the money and be up to date. It's easier to get help here as everyone's on the same versions.
You can keep X1 installed because it has a few plug ins that Professional might not have.
For starting out what I think is cool is download a free midi file of a song you know.
Just enter a search for the song = Sultans of Swing midi and look for simple web pages that have the song listed in alphabetical order. The midi file should download in 2 seconds without fuss. If it re directs you leave that page and try another site.
Open it into Sonar ( don't import) insert the TTS-1 for starters as it will play all the track using GM midi.
First thing I do is mute all but the Drums bass and piano. Don't go by the horrific sounding vocals and attempts at guitar parts.. Later you could insert Session Drummer or if you upgrade, Adictive Drums and improve the drum sounds. Then say insert the SI Bass synth and on and on. You can make that GM file sound pretty good if it was sequenced properly to begin with. I look for well played drums parts. Drums are the most work when constructing a song from scratch. So I always will see if I can find a file on line. Now you can use that to add guitar and vocals parts ( audio tracks) to learn how it all works.