Is there a difference between the writing of Chinese characters and calligraphy, and the left and right strokes?

In the writing of standard characters, both left and right are written horizontally first. When writing calligraphy, it is not uniform. When writing regular script, it is a personal habit to write a horizontal picture first, and it is also ok to write a orthography first. To write a right word, some calligraphers write the left picture first and then the horizontal picture, some write the horizontal picture first and then the left picture, but there are more left pictures and then the horizontal picture. Personally, I am used to swearing before crossing.