Find a demo first, BIAB used to have demo versions availible, if they don't, then ****ing pirate it. If you like electronic music, BIAB is not for you. BIAB is for tonedeaf mongoloids with no taste in music whatsoever who literally want the computer to make the music for them. I've heard of these "styles" in the "arranger" sense and it honestly sounds like crap to me. If you're going to let a computer make music for you, at least let it be fractals.
Anyway - since I've come out so strongly against BIAB, I guess I'm somehow obligated to list alternatives. Fruity Loops is a "toy" program that I'm actually very fond of, and if it's price ever dropped from $100 to something like $20, I'd buy it for shits and giggles. Reason is a step above FL, but I've never touched it - still might be worth looking into. If nothing else, pirate an old copy of Rebirth, as much as I hate that program it's 100,000 times better than Ass-Sandwich In A Box.
What do I use? I sequence an Ensoniq ASR-10, an Ensoniq Fizmo, and a Korg MS2000Rack with Logic Gold 4.8. I also use Logic's plug-in sampler, EXS24, along with Reaktor as virtual instruments. In my opinion, and this is entirely subjective, this is the best setup. Of course, if you're just beginning, I would not advise Logic or Reaktor for a newbie as they're both very complicated. I started out on ScreamTracker, but I would not advise anyone doing that as you'd likely spend most of your time learning how to program in hex, which is a waste, really. But I also started playing string bass and saxophone when I was 8, years before I ever touched a computer, so I had a little bit of music knowledge by the time I got to that point.
Other suggestions you may get are things like Cubase and Cakewalk/Sonar, which are sequencers just like Logic. You might try tackling a MIDI sequencer, but I think the absolute free form they offer might overwhelm you if you don't know much about musicianship and songwriting. Step sequencing in a program is the way I think you should go for now, not only would it be easier to get your ideas out that way, but it also seems to fit more into the popular/dance electronic music aesthetic.
Of course, if when you say "electronic music" you mean stuff like Iannis Xenakis, then you're already in too deep.