All the major DAW applications offer similar basic recording/editing/mixing capabilities.
They're all pretty similar on this level... and they're all relatively easy to use.
As CJ mentioned, if you're completely new to using a DAW... and to mixing, you've got a steep learning curve.
Understand that up front... and be patient with yourself knowing that it's going to take time/effort before you'll produce something that sounds like a "record".
The more esoteric features are where the greatest difference lies between each of the major DAW applications.
Sonar X3 is a good balance of:
- Capabilities
- Fidelity
- Ease of Use
- Included Plugins/Processors
Sonar X3 is one of the more "complete" packages... providing everything you need to get started.
Once you get up-and-running, you'll no doubt find other (favorite) 3rd party plugins for specific applications.
No matter which DAW application you choose, it'll have strengths/weaknesses compared to the others.
Most important is to checkout a few, make a decision that best fits you and your situation... and start learning.
Once you're familiar with one of the major DAW applications, it's not too difficult to switch to another (if ever so desired).