It's easy for me to copy the brush font, so I like to grasp the root of the pen. I feel a little more stable. Will this grip affect my future writing?

Your grip is wrong. Although there are no strict rules for holding a pen with a brush, the most suitable position is the middle and lower position of the pen. Maybe at the beginning, my hands were shaking and I could hold the bottom firmly, but after a long time, I limited my pen power and affected my writing skills.

Let me introduce you to the commonly used "five-finger writing method":

That is, hold the pen holder with the fingertips of thumb and forefinger (appropriate height) to ensure that the pen holder does not fall off;

The middle finger is placed on the outside of the pen under the index finger, which not only strengthens the power of the index finger to pinch the pen, but also plays the role of hooking the pen in;

When the nail of the ring finger touches the inside of the pen, it plays the role of pushing the pen outward;

The little finger is attached to the lower part of the finger belly of the ring finger to help the ring finger push the pen outward.

When holding a pen, as the ancients said, it is convenient to carry a pen. When learning books, you should often practice holding the pen, returning the hook, pushing out and rotating the pen holder (plus the role of the wrist) and drawing straight lines and arcs. The level of writing and whether to hang your wrist or elbow depends on the size of the written words. Small print low, wrist pillow. Hold high the big characters and hang your wrists; No matter how big you are, you need to hang your elbow.