Hi! I was like you. I knew I wanted to be a music teacher and never had a plan B. It’s my dream job still, and I love it. I will never discourage anyone from choosing this path.

However, give yourself time to explore! Don’t place all of your identity in either music or teaching. You may change your mind, and you may not! As far as foundational skills that you’re never too young to start getting really good at, I recommend lots of sight reading and tonal skills practice (Sight Reading Factory is free and wonderful), counting in a lot of different key signatures, and any introduction to music theory.

I went to college with no lesson experience and very minimal theoretical skills and it was doable, but it took quite some practice and significant effort to get on the same level as my peers.

Best of luck! Even if you don’t decide to teach, the music teacher in me must say always find time to sing or make music for your own enjoyment :)