In general, you can't get a job in X without experience in X. The irony has been recognized for generations. But if you have experience in X, what you can do is get a job doing X but do some Y at the same company as sort of a volunteer. People will often share some of their grunt work with you if you don't insist on getting any credit or money for it.

But then, you get experience in Y. If you're good enough (sometimes just meaning hard-working enough), you might get recognized for it and offered an opening doing more Y if they decide they need someone. If not, you'll still have genuine "professional experience" in Y to put on your resume.