Totally agree with wowbb,
Learning something new is hard enough on the short courses offered today. To then add into it another brand which may be very different from that which you trained with will be a nightmare.
Get qualified, get experience from family and friends and practice,practice,practice. if then it doesn't suit you,swap to another brand.
Trainers won't help you out if there are a few niggling problems and you tell them that you have swapped brands...you are on your own.