Hiya,
yes I've been doing baby massage since 1999, don't know why you've put it in nail geek though.
I used to be rushed off my feet teaching baby massage, did about 3 classes a week, and used to provide classes for sure start and did talks at the local parentcraft.
This was great!
Then all the sure start staff, health visitors and some midwives got trained up in it, which is fantastic, but as they offer classes for free, my classes dwindled and I obviously my sure start work dried up (in fairness to them, they did tell me upfront their intentions).
I am also freelance baby massage instructor at a local spa, but only get asked to go in about twice a year.
It is very worthwhile, BUT check what your competition is first. If all of the local surgeries are offering it for free, you may struggle to get bookings.
Have you got a local NCT group? Do some market research with them, they have branch magazines that you could advertise in too.
Any questions give me a shout.