Do it, if it's what you want just go for it
Hey Inspired - I trained in hairdressing when I left school and completed the NVQ level 2. To be honest like a lot of people have said I didn't really know what I wanted out of life then and didn't take to it, so gave it up.
I'm now doing beauty courses and have thought I would like to do barbering so when I'm fully trained and ready I can offer a service tailored to men.
I'm 25 and I contacted a local hairdressing school and they told me that while they didn't do a specific barbering course I could go as an apprentice and do my level 3. A friend of the family who is in his 50's has been going to college to train as a plumber and he recently went to an Apprenticeship Fair and asked could he apply for the jobs and was told yes - and on the apprenticeships website
The Basics - Apprenticeships there is some information about adult apprenticships.
So it looks like apprenticeships are open to people of all ages now!