At the age of forty, you can learn from your master for a year. There are many factors that need to be comprehensively considered when studying the installation and construction of suspended ceiling, including technical difficulty, experience, study time, personal ability and so on. One year's study time is ok for mastering the basic skills of ceiling installation, and the actual operation still needs experience and practice. Ceiling installation is a job that needs attention to detail and accuracy, and it will face some challenges for novices. Therefore, in addition to learning from the master, you can also consider participating in relevant training courses or artisan apprenticeship programs to gain more comprehensive skills and knowledge.