Breathing low
Breathing remains an interesting topic when it comes to singing, but if you think about it logically, it doesn't have to be that complicated. The key is to always start from relaxation. From relaxation, engage the muscles where needed to provide breath support. If you tighten everything up right away, you'll end up breathing high and become short of breath. Keep your breathing low.
Focus on a low breath. When you breathe from your diaphragm and keep your breath low, it helps support your voice without causing tension. This will give you better control and allow you to sing more freely.
The more you focus on that relaxed, low breath, the more control and ease you'll have in your singing. It's all about staying calm and grounded.