Question 1, it seems that you drew it by hand. If you are afraid of heavy colors, you can consider drawing with a computer. If you have to draw by hand, you can make a copy of the manuscript (or draw it on a desk) as a backup. Boldly use a pen on the backup, wait until the color matching feels almost the same, and then go back to the original.

Question 2: Plagiarism is the best way. Find your favorite style, look at the pictures, or just draw some pictures with tracing paper. Only by doing this can we know the gap. Copy more, you will have a more conceptual structural proportion in the depths of your brain, and what kind of length, size and shape will gradually form. After a period of time, you must leave your old job and create your own things.

Question 3: As long as you can search with Baidu, there are tens of millions of information about swords. Draw according to the picture. Famous Japanese cartoonists usually collect materials. Don't think that they are really created out of thin air. After all, comics are all-encompassing, and there are too many things to draw. I suggest you set up a data folder, classify scenes, objects and people, and put all kinds of data in a folder, so that you can directly find the places you can't do in the future.

Question 4: The vision of cartoons is different from that of realism, unless you draw realistic cartoons, so if you want to sketch, you might as well read more famous books. In fact, cartoonists have various occupations, which does not mean that they can draw cartoons when they come out of the Academy of Fine Arts. On the other hand, many people who have studied traditional sketch will gradually embark on a road different from their own ideals because of the rules and regulations of the teachers in the Academy of Fine Arts (to quote friends and teachers, they are not allowed to draw such long legs and eyes, and they are not allowed to read more cartoons in order to draw a correct figure). Basic skills are of course necessary, but to be honest, most of the teachers in the Academy of Fine Arts are artists, but how many can draw multi-grid cartoons (Japanese and Korean style)?

Question 5: It's best to read more pictures and information about the human body. If you have money, you can consider buying a BJD nude doll, which can pose as many as you need and take many angles. Although it is not omnipotent, it is a good helper for beginners.