Consider practicing with family or friends. You can pick a topic and practice asking questions and commenting on the topic.
Example Topic: Movie
Talk about a movie you like.
Ask what kind of movies the other person likes to watch.
Ask why they like it.
Comment about your thoughts on that movie (if you have watched it before).
Example Topic: Books
Talk about a book you like.
Ask what their favorite book is.
Ask about what happens in the books.
Ask what kind of books they like.
Ask if there's any upcoming books they're excited about.
Also practice natural transitions of topics after conversing about the same topic for a few terms.
But be sure the topic you talk about next is similar to the previous topic you were talking about.