First of all it really helps to have a college degree. You're ready for advertising, especially considering all of the things that you've read, written, and possibly even published. You need skills that only your college education could have provided. If you took any classes in advertising then these are definitely going to help. But remember when I said you don't need a resume for these advertising marketing jobs? The truth is, you're going to need a resume, but not just any resume. Jobs in advertising require resumes that stand out among all the rest.
If you are not good at creating resumes, then you'll want to speak to a professional resume writer. Advertising jobs leave no room for mistakes, and your degree has much to do with what sort of position you will be getting. For example, if you have an Advertising major, you might not get the job you want at first, but you will at least get into the industry. You might end up as an account executive, but at least you are in the business!
Most ad agencies aren't going to take you if you don't have a college degree, but you can try to attain a specialty degree if you simply do not have the time to pursue a bachelor's degree. There are many schools out there that have copyrighting programs. These programs will provide you with everything that you need to start in the copyrighting industry, and though you won't start out with an extremely high paying position, you will at the very least have something that you can be proud of.
Make sure that you do some research into the industry before you commit to being a part of it. You need to know that advertising marketing jobs are not going to be easy, and they will in fact involve a lot of hard work. Remember that in advertising jobs it's all about what the client wants. If you need to stay late to please your client and bring them what they need, then that's just what you're going to have to do.
The days are going to be long, and the pay probably wont' be too good to start with. But at least you'll have a sense of worth, as you're finally starting out on the path to the jobs in advertising that you've always wanted. There's going to be a hump to get over, just like in any other job, but when you've gotten past the hump you may just find that you've fallen into the job of your dreams. You'll never know until you try!