Learning software and books
If you want to be an interior designer, you must learn some indoor ergonomics, lighting systems, materials and construction techniques. The first two can buy books, and the latter can only accumulate experience in building materials market and construction site.
Learn sketching colors and hand drawing.
Why don't you learn some sketch colors, three parts, and hand-painting? If you are savvy, software and architecture are easy to learn, and color and hand-drawing depend on some talents and feelings.
Obtain the certificate of interior designer
I only know two certificates of interior designers, one from China Institute of Architectural Design and the other from ICDA International Association of Interior Designers, which can be tested by many training schools.
Flexible mind and innovative thinking
The most important thing for a designer is to be flexible and innovative. No matter how good you learn kung fu, you are not a designer, but you are an operator, but no matter how good your creativity is, you can't show it, so being a designer has a long way to go.
Read more excellent works and design information.
One more thing to remind you, if you make up your mind, you must stick to it, study at home, go out to study more, and go out to see more new things and take more photos if you have nothing to do. If you read more, you will naturally have more ideas. It is also important to visit more websites related to design types, read more excellent works and look at design materials.