First of all, we should have the concept of structure, and structure depends more on experience. Do more, natural lofting will be better. And what software do you use for lofting? Every software has its own advantages and disadvantages, so we should foster strengths and avoid weaknesses. Software is just a tool, and the most important thing is to master it yourself! We should also go to the workshop more often to see the production and do the technology in combination with the actual production. Beginners must be patient, and it is best to have a teacher to take care of you. Self-study is very painful!