Copywriting

I am seriously thinking of doing a copywriting course, with a few to freelancing and then working in an employed position. My work experience is mainly merchandising/mystery shopping, but I need a change of direction and to earn more. I used to have a blog, but gave it up for personal reasons. I also started a post-grad journalism course 10 years ago but had to give it up. I have decided the copywriting might be a good option as there does seem to be a lot of work around. Any advice would be very welcome, particularly with regards to courses. I am doing a Reed course at the moment which is very geared towards copywriting for people trying to market their own products, but recognise that I need something more indepth.