How to choose a writing brush when learning European calligraphy

I have seen pens, ink, paper and inkstone in the Tang Dynasty, and I can tell you responsibly that the pens used in the Tang Dynasty are hard pens with thick barrel and short nib, and the nib is sharpened quickly. So you should learn from Europe and use wolf hair to get close to the original taste; If you want to make the strokes thicker, you can choose a double brush. Don't be blind in learning calligraphy, and don't be superstitious about those who have little knowledge. We need to know why, and more importantly, why.