I would say, go for it!
First, however, take voice lessons that are offline because you could damage your voice.
Next, maybe join a choir and get involved in MANY singing opportunities, mostly voluntary ones because those are free and more people will be there.
Third of all, practice, because practice makes perfect!
Fourth of all, maybe start posting videos of you singing on YouTube publicly if you want other people's true opinions.
Last of all, good luck on your Grammy!
**Dont read this if you don't like fan girls, and preachers.
I am a big fan of Pentatonix, and from their older videos I can see how far they've come. Scott Hoying auditioned for many things before The Sing-Off, including HSM 4. There was a high school trio, they auditioned from the song 'Telephone" for many things, and did it so well they won auditions for The Sing-Off. From there they created a YouTube channel, and their first big hit was the Daft Punk Medley. I bet that the trio never thought that they would ever be nominated for a Grammy, let alone WIN 3! They did take a big risk, however. Mitch Grassi quit high school for The Sing-Off.
Follow your dreams, and you might win a Grammy!
Good luck on your journey, sorry for preaching.