On which platforms can freelance photographers take orders?

It depends on what you want to do. You can post to Douban Group and post a photo service information on AIA APP, and the traffic is OK. Generally, you can take a few orders, or you can talk to the local photo studio yourself and see if you can be a part-time photographer and shoot at a fixed time. Ordinary orders can protect old customers, and old customers can help you introduce some new customers, hoping to help you ~