In that case, I'd highly recommend you check out Gabriel Wyners pronunciation trainer content. I'd suggest reviewing them every so often because they include tips like where to put your tongue to produce certain sounds. The stuff is generally awesome and would no doubt be helpful in supplementing whatever program you're using.
Oh ok! Learning new languages (this is my third!) is all about constant consumption of high quality content - as such all advice is appreciated!
Perhaps this might make it a little clearer.
Wow that is a lot clearer 😅
How is the mandarin going?