Yes, and I think it's just the right age to start practicing calligraphy. Wang Xizhi also began to learn calligraphy at the age of seven, hehe. This age group can standardize some common sense knowledge such as sitting posture and holding a pen. When writing, you can start with simple stippling, such as point, horizontal, vertical, press, fold, hook and lift. Because Chinese characters are composed of these eight parts, they are well written and can lay a good foundation for the future. The rest is how to combine these parts beautifully!
Hard pen calligraphy and soft pen calligraphy can be practiced together, or they can learn from each other, such as brushwork and structure.