@Jordan ****
Congrats! You must be talented for foreign languages.
My daughter (now 21) had Thai as the first language she had learned, from 0 to 5 years old.
She is taking 1:1 lessons (400 lessons so far) and she can not make a meningful phone call in Thai language.
Her Thai courses are by an accredited Thai teacher professional (she even comes in the official uniform) : writing, reading, talking.
While, you are going into "advanced" class.