are you comfortable with sharing what brushes you use? im trying to learn how to paint properly but neither i nor the person helping me have any idea how you get the soft velvety texture in ur art
That would be Brush Density (as it is labeled in Clip Studio Paint, it is under the Brush Tip menu) or Flow (as it is labeled in Photoshop & Krita), coupled with lowered Hardness. Don't use low Opacity, or set the Opacity to change with Pressure, though, cause it makes it look bad.
This video may be helpful in explaining: