It's never too late to start the BJJ. But this is not just fascinating as you seem in UFC fights if you want to do this take this one seriously and join a gym or any other BJJ school. In the start it seems hard or might be you may run but if you survive this fascinates you more.
I've had a little dabble this year, other than that done a few sessions quite a few years ago, but not enough to get any sort of grip of it, this year I've done a little bit and I think it's something I'll definitely get more involved in