Amazing thank you so much!

Hi guys!

I have a BSc in Psychology and MA in Human Rights. 2 years ago I got a Level 5 TEFL qualification and taught English in South Korea. Now I would like to pursue a career in Linguistics. Since I paid for my MA myself, I don't qualify for an MA Linguistics. In the long run, I would like to do a PhD in Linguistics and become a researcher/lecturer in Linguistics.

Birkbeck Uni offers a graduate certificate in Linguistics Studies that I can afford. It only offers total 60 credits.

Question: Is it worth doing the graduate certificate (60 credits) in Linguistics Studies now and apply for a PhD in Linguistics starting in 2021? Do I stand a chance?

What are possible routes for me to pursue a PhD in Linguistics?

Thank you so much in advance for all the advice and suggestions! :D