I was in your shoes and "reinvented" myself you could say. Formally an accountant and morphed to an IT person. I was able to make the "leap" by working for an accounting software developer. I racked-up IT experience there, migrated to their IT department and was able to pursue full-blown IT jobs going forward. (It was a small business that was willing to take a risk on me. Some small businesses can give you lots of exposure/experience.)
So I guess my suggestion is, depending on what your current experience is, find a job that's in-between what you do now and what you want to do (IT). Then gain experience and migrate.