Hehe, it seems that you are really looking for the answer, but you are impatient. Let me give you a suggestion. Use it according to your own characteristics. This varies from person to person.

1, proficient in CAD, then you can draw and know its basic principle. This is one of the basic skills. CAD is a pen, mainly your spatial thinking ability. You should see more pictures drawn by others. This is one of the main learning methods.

2, look at your problem, you should focus on interior design, then you need to supplement the basic knowledge of interior design, mainly the following.

Construction technology: this is not a lot, mainly the ground ceiling bathroom, wardrobe bar lobby and many other things. But if you look closely, you are not divorced from the above content.

Materials: The most difficult thing in decoration engineering is materials. There are nearly ten thousand kinds of them with the same name and different manufacturers, and the internal unit price will be the same, and the cost will vary greatly. You should also consider how to use them, where they are suitable, and the overall style of your design. Hehe, after reading a lot of decoration, you can never say that you spend less money, but it looks neither fish nor fowl, which is the reason for the inconsistent style.

Design style: This represents whether your design is successful or not. This is to study the styles and characteristics of various renovations, use them flexibly, and master the scale. Only read more, study more and summarize more.

Hydropower: You should know something about this. Now most interior decoration designers include hydropower design. Knowing this will definitely help your design. The point is not difficult. You can master the essentials of design in three months.