So basically I'm 17 years old and unfortunately I have an underbite (in my opinion).
Therefore my nose looks big and my face doesn't look really esthetic.
I have had braces and still do have small ones behind the teeth.

I ve heard that proper tongue posture should help growing the maxilla and make the facial bones look better in general, but I do have a hard time finding the right spot where my tongue should be resting.

The tip of my tongue touches my small braces behind the teeth and the back pushes against the roof, however I have heard that I shouldnt force it too much.

I really want to change my looks, because I do hear things about my nose being big and i really dont feel comfortable anymore. Any tips or experiences would really help ...

I want to have a masculine face

Here is a picture of how i look from the side:

https://drive.google.com/file/d/1hSMFHjDacQq6NpCO9rdG-WfiTiaVimEY/view?usp=sharing

https://drive.google.com/file/d/1Qs4W4GxNofMiOt4tYpH8csiM3VmoYmcr/view?usp=sharing