Nothing to add here. Good advice. I especially agree about getting a classical teacher rather than a pop voice coach. Singing opera is probably the most demanding kind of singing there is (imagine trying to act and be emotionally expressive while singing over a full symphony orchestra going full-blast!), and just to survive until their next performance, an opera singer has to use good vocal technique.

Also, make sure they know what kind of songs you want to sing, and that they respect your songs and your ambitions enough to give you their best in the same way they would an aspiring opera singer. None of this "you don't need voice lessons to sing that stuff." I had one voice teacher say that to me, and I walked out and found somebody else.

Don Firth