Hi Ali,
am in the process of a career change to Floristry!
For me its a long process, I'm still in a job which I love (most of the time!) so didn't want to jump straight into a trainee job in a shop. I decided to get some qualifications (C+G 1 now halfway through level 2) and do additional non certificated courses (wedding work etc). 2 yrs down the line from deciding, I still want (and plan) to switch; but think it is so important to get some experience in a florists - have done a little bit - mainly conditioning, sweeping, wrapping, writing order cards to support a friend who's shop was busy at Christmas time.
Read the threads on here - because the guys on here will give you an insight as to what its like. If you're creative, I'm sure you'll take to it but don't have any illusions that its going to make you millions. I've done some freelance work - 3 x weddings and loved every minute of it so far but I can see the negatives as well as the positives and I still want to do it.
And if when the time comes once you're studying, only take on work that you know that you can deliver professionally (once people know you're learning floristry, you'll get asked to do work). There's a lot of people who have done a few lessons and then turned out shabby, substandard work when been approached to do a real job e.g. wedding for someone.
Be warned, its gonna cost you to learn - I am buying flowers all the time to practice - even if there isn't a class, I see it as an investment in my future. Good luck with whatever you decide.
Out of interest, what are you doing at the moment? How old are you?
