The proper pronunciation debate is ancient and not confined to English speakers. It's universal, irrespective of language.
All over the world as soon as anyone is old enough to speak, there will be someone guiding their pronunciation in an attempt to make it "right".
So, do you say "I wanna " or "I want to"?
Is it "gunna" or "going to"?
And does it really matter? Well, yes, it does. Quite a lot. Because what happens in our lives can be the direct result of how we speak.
For a collection of excellent resources to help with articulation and pronunciation go to proper pronunciation.
Hope your New Year is shaping up well.
Kind regards,
Susan
PS. If you need help with American English pronunciation be sure to check the free online course from Carnegie Mellon University.