If you don't know where to find a conversation partner, the other thing you could do is start to talk to yourself, or, if you're not comfortable talking to yourself in public, just think to yourself.
如果你還是不知道該從哪裡找到口說練習對象,第二點就是你也可以試試跟自己說話,如果你覺得在大庭廣眾下跟自己講話很怪,那就在心裡默念。