You need to at least go for a trial helicopter lesson and find out if you like it. Most people love it! As an instructor, sometimes I feel a bit like a drug dealer - I give 'em their first fix and it gets them hooked.
But just occasionally the opposite happens. I had one chap who was all set to do the course etc; he did a trial lesson, and I knew within 15 minutes we'd probably never see him again.....and we didn't.
So get a helicopter flight, and maybe a f/w one while you're at it, and then at least you've got a bit more information before you make your decision. As for making that decision, I'd say go for it if you want to, but try and make sure you have something to fall back on if it all goes pear-shaped or you decide you were wrong after all. Not always possible, but worth bearing in mind if you can.