Asking DC questions sounds really interesting and fun to explore. I haven’t really done that besides asking normal questions pertaining to the story, I should attempt that as well.
Telekinesis is absolutely one of the BEST abilities you can have in dreams. It allows for so much possibilities and is also very useful and exciting. Have you been able to do it in previous dreams? I don’t know exactly how to explain the way to do it besides a couple of important things to keep in mind:
You have to believe in your mind that you’ll be able to do it (Lift objects, throw them). As long as you know you can do it, the size of the object shouldn’t matter.
Using your hands is also important, and will help. I don’t mean actually touching the objects, but to move your hands around, following the object that is in the air, and pushing your hands forward in a throwing motion etc. Things like that. Just like Scarlett Witch does in Marvel comics/Movies.
There are a lot of variables and situations when using TK so you can try out different methods and use one that best suits you. TK is the main ability I have/use but even then, occasionally it doesn’t work so don’t get discouraged if the first few times you can’t do it. Even as recently as a few hours ago a dream I had involved getting into a TK fight with someone on a higher ledge than me, we were throwing objects at each other and it was intense. One thing also is TK is similar to Psychokinesis, which you should try and learn as well. A lot of abilities fall under that term. Pyrokinesis is one of them, that’s the ability to conjure fire and things like that.
You should post an update after your attempts, it would be great to see your results. Maybe you’ll become Scarlett Witch of the dream realm! Haha.