What appeals to you about floristry? Is it the 'little flower shop' that you're aiming for? What is your set up at home? Do you have family? Do you need a work/life balance? Do you need to earn a living?
The perception and the reality of floristry is generally quite different.
If you want to 'play' at flowers, have a semblance of work/life balance and aren't worried about making money then you can work for someone else for a few hours a week, freelance on weddings or just do bits and pieces for friends and family.
If you want to earn a living (i.e. run that little florist shop) then you must be commercial and prepared to work very hard. My friend has just sold her (successful) flower shop but she was working 80 hours over 7 days a week. Rising flower prices and Brexit have also made life very difficult for florists. It will not make you rich.
Yes, it is creative but that is just a fairly small part. Overall it is very very hard work. It is dirty. It is often cold. It is very physical and there is a lot of heavy lifting. It is also stressful. Things regularly go wrong on weddings; things fall over, things break, flowers turn up on the delivery in the wrong colour or they get left off the delivery, the lorry with your flowers on gets stuck in the tunnel. I could go on and on and on............
In the first instance, I would tell you to go and get some experience in a shop or workshop first before shelling out on a course. Go and see what it's really like. Go and condition flowers, scrub buckets and sweep the floor. Speak to the owner and the people that work there. Winter is approaching so see how you get on working in the cold. The last shop I worked in we worked with no heating and the door open. It was a killer!
If you love it and want to do a course then get some proper old fashioned training (i.e. horticulture college). You will then learn the right way to construct arrangements, use the right tools and materials, wire properly, etc. I would be careful with some of the commercial courses. Yes, there are some great courses but equally there are lots of people who decide to become a florist, do a couple of two hour workshops and the next minute they are running workshops themselves. These are NOT the people you want to be training with.
I've worked as a florist for a long time. I also freelance. Initially I did a bit of work and they did a 1:1 course with a London florist who was well established. I still speak to him now. That course taught me a very small bit of what I needed to know. In all honesty, it has taken me a very long time to be what I would call a 'good' florist. You need the basics (i.e. decent course/training) then you need to work with people who know what they are doing and learn on the job. I honestly don't think you can do this yourself initially. There are a lot of people out there who do a career course then set up on their own. I thought this is what I would do but I'll be honest the people that generally do this aren't producing particularly good work when you look at it from an experienced view. It's rife at the moment because people tend to think it's an easy job. I also know having freelanced with loads of people that have done this is that they've not made money on jobs. In fact, someone I spoke to tried to do Mother's Day on their own actually lost money.
I'm not putting you off. I love being a florist. I'm just trying to be realistic about it all if you think it would be lovely to be creative and do a non-stressy job that you fit in around your family because frankly those things it ain't!