First of all, your three degrees are not a problem, because there is a serious shortage of domestic civil aviation pilots. Most companies require a bachelor's degree, but not a few. Many of my current classmates graduated from three universities. Although three books is not a problem, English is a big problem. I hope your English is good. Ps: CET-4 or TOEIC certificate is a must!
Secondly, major airlines basically recruit flights throughout the year, and some companies even conduct two rounds of recruitment, one in the first half and the other in the second half. Every round of recruitment has traveled all over the country, and you can choose the nearest city to participate in the recruitment. Recruitment information can be found on the airline's official website. It is recommended to check the recruitment information on the company's website regularly. This is one of the ways. In addition, you can participate in the recruitment of some civil aviation colleges, such as Nanjing University of Aeronautics and Astronautics and China Civil Aviation Flight Academy. The way is to check the school website and the flight academy.
As for the air force, I don't understand. I hope it helps you. If you have any questions, please leave a message.
Wish you success!