After I went through this whole conversation and watched people split into 2 sides (I didn't include people insulted each other); I have to take my side. Both sides have great and reasonable points but both also have terrible ideas. I pick up my side because I do not trust in elitism nor favoritism.
The old men used to say [Great tools do not make great worker] (Norsk proverb). No matter what tools, DAW, instruments you use later on; they do not help you to get better. It is your ability and skill to be gained on which tool you would like to experience with. These are opinions. I do not force the asker anything.
The side that stands with live instrument has reasonable points. You can learn musical theory while learning how to play an instrument. It will help you to widen your musical knowledge, creativity and flexibility. However what's with the aggressive attitude, ladies & gens?
Here, I have some practical suggestion for your situation:
Tracker, I use MilkyTracker, OpenMPT and Psycle and NorskeDtracker (I need beta testers :-D). Reasons: they are free, easy to learn and small.
Guitar is probably the easiest instrument to learn and experiment with. Also it is the cheapest instrument you can get.
You can always use a MIDI keyboard. Second cheapest to guitar. it is fast and flexible for all age of players.
I hope all these information I suggest above may help you out, my friends.