Hey Camille! I've been working with all the info you gave me and I'm really motivated because I can belt a B4 but I found a concern. I can belt a B4 but I can't really sing in B4 with mix voice so, I've been trying to lower the volume, taking less air, and using an Oh/Uh vowel but it always turns into head voice. Do you think that I have to be patient until my muscles get used to that?

Hi, Tobias! My thought is that you may already be mixing (just in a chest-dominant mix). It would be quite rare for you to sing a B4 in full chest voice. But regardless, it's a good idea to train your head voice and lighter mix in that range! A "bratty" NAY or NO would be great for that.