Hi xiaowen, I am a community tutor here on italki. I speak English natively and I am fluent in Spanish. I teach Spanish vocabulary and grammar. I can certainly also help with you Spanish pronunciation. I actually have a class completely dedicated to that topic.
As for my qualifications, I have a Bachelor's Degree in Spanish Linguistics, and I have been studying Spanish both in and out of school my entire life. As a result, I know the IPA for Spanish and know how to teach the sound inventory. I have also lived in South America.
I would love to talk with you about your goals and needs as a Spanish learner, and you're welcome to book a trial lesson for only 4 USD on my teaching profile if you'd like!