Here is what a lot of people won't tell you about marketing. I would spend some time thinking pretty carefully about the choice you want to make. Marketing is vastly different from IT, and is extremely competitive. While the IT world is desperate for good people, marketing is saturated to the max and not only that, but you'll be competing with other people who don't have a marketing background for entry level positions. When I hire entry level people, it's not uncommon to see hundreds of resumes for one position.

Marketing goes far beyond what you see on the surface - it's definitely not the romantic version you see on Mad Men, at least not in most places. A lot of entry level work is extremely dull and boring - database building and analysis, data entry, reporting, etc... Unless you somehow find work in a creative agency - where you should be prepared to easily work 80 hours a week for a small salary - you'll probably do a lot of very boring things at first.

Compared to IT marketing doesn't pay very well, unless you are very good at what you do, and the competition gets steeper as you progress in seniority. Like in sales, a small % of marketers make the most % of money.

To succeed in marketing you have to be prepared to learn all the time, because marketing techniques and deliver channels change constantly and if you're not on top of it, you're out of the game - like all of the social media people once companies realized they want actual, measurable results from social.

Marketing is tough because you're often measured by your results and you need to deliver constantly. Every day is a new challenge.

The older you get, the more difficult it will be to find work in marketing -- like it or not, it's a young man's game, and unless you move up in rank, there's a good chance you'll find yourself struggling to find work - I meet people like this all the time.

Once you understand all of that, and you still want to give it a shot, you might consider starting out in sales, which is a component of marketing. Do at least a year on commission. Why sales? Because it's hard - anyone can write a blog post or create a social media profile - people like that are a dime a dozen in marketing.

Sales will teach you a lot about yourself, and about other people - the good, the bad and the ugly. Sales will force you to think outside the box, especially when you're competing with other people who have the exact same product you do, and some at a lower price. Here is where you really start thinking strategically, learning as much as you can and testing. That's what a lot of marketing is about.

Obviously, there are some seriously great things about working in marketing as well, but you should also know that it's probably going to be how you envision it in your head right now, because you're unsatisfied with your current job.