Welcome to the forum.
I'm going to leave the answers to someone here who teaches pronunciation (I'm a teacher of conversational English but with no specific pronunciation classes). However, please note that I've made some corrections to your post above. Don't take it as criticism; just remember that learners on this forum will see that you're a native speaker and assume that everything in your posts is written correctly. We spend a lot of time correcting their capitalisation and punctuation so we endeavour to make sure that our own posts follow the advice we give them day in, day out.

Teacher (Other)