godparticle
Bottom line is that no one in their right mind is gonna spend a month trying to learn a DAW that might not be the appropriate one, that should be obvious.
Why not? People quit college 2 years into a degree because they realize they're on the wrong path. People try out new careers that may or may not work out for them. People put months into a relationship and then come to the conclusion that they're incompatible with the other person. I'm afraid that's life....you speculate to accumulate. Anyway, I'm sure you don't have to "learn a DAW." You just have to play around with it for a while. Do what I always do, start a test project and see how far you get with it. That's what I did with the Sonar demo. I start out by recording and editing some audio. You should get a feel for that within a couple of hours tops. Then load a VSTi and try some MIDI. Before you know it you have the seeds of a tune started, and your desire to take it somewhere necessitates the learning of a few more key techniques.
Within a day of installing the Sonar demo I had the beginnings of a tune up and running. And since I usually mix a little "on the fly," by the second day I'd learned the basics of the ProChannel. I would say that within a week I had the basics of interface and MIDI setup, loading softsynths, editing in the piano roll, the basics of the step sequencer, using the console and the ProChannels, manipulating clips etc. By no means had I really "learned" all this stuff thoroughly - I'd just gotten the gist of it to the point where I could get a feel of Sonar's workflow and methods. If you've used other DAW's before - which I'm sure you have - then you'll learn the basics in no time, just enough to evaluate the program against another one.
For me, coming from Pro Tools, I really appreciated how much better Sonar was at most things. I decided it was for me within less than 2 weeks. And by that time, I had a full-on tune in the works that I wanted to finish in Sonar. Of course if I decided to go with another program, I could have exported the MIDI and audio and made notes of my instruments and effects etc so that I could get it up and running in another program. But that wasn't necessary.
The thing is, in the space of a week's worth of fishing for answers on forums (which are going to be based on subjective experience anyway and may not apply to you), you could get the basics of two DAW's down enough to compare the two. I would just bite the bullet and go for it. You're looking for a DAW that is hopefully going to last a lifetime (a good few years at least). If you were looking for a girl to spend the rest of your life with, you'd expect to take more than a month to evaluate which girl was right for you. So what's the difference with a DAW, which you're probably going to spend more time with anyway