These days, more and more students want to practice speaking English with me. They say they want to speak more fluently. During the lessons, I try to speak only English as long as they can understand what I say. Only when it seems difficult to them, I sometimes switch to Japanese. (When I teach international students, I speak only English.)
If you are an English learner, I suggest that you talk to yourself in English at home. You can express your feelings or describe something around you. You will realize that there are many things you can express using your current vocabulary. You will also encounter something difficult to say. If you find it, you are lucky. Write it down and try to figure out how to express it by using a dictionary or asking me.