Unpaid Paralegal Internship for non-student

Has anyone tried unpaid paralegal internship even though you're not currently enrolled in a school?

Would be happy to share your insight and experience about it.

I have a law degree and legal assistant experience from abroad but most of the US paralegal/legal assistant job posts require law firm experience. Paralegal certification is seldom mentioned. After several job interviews, some are candid enough to say that they are looking for someone who has a US work experience.

I would like to enroll and get a paralegal certificate but I want to have an experience in a law office before spending money in a paralegal certificate program.

Thanks for the input.

Displaced is right. You have legal experience. There is no such thing as an unpaid internship position. You get into something like that and you are going to get screwed over (and resentful). Go for the U.S. laywer licensing.