I study clothes, and you have no foundation. If you have the conditions, you can go to a regular fashion school to study design and engineering or fashion design. It takes a long time, not very practical but very detailed. What you have learned is only the basic principle, and you will gradually combine it with practice in the future, which is suitable for larger clothing companies to make a pattern and make it in batches. If you start from an early age, you can go to a crash course, which is short in time, practical but very general (most clothing stores learn quickly and cut quickly), and then further study. I'm not sure what you want to do, just a suggestion, please accept it!