There are different meditations for difference purposes, and sometimes to “meditate on something” means to get in a quiet, light trance state and think about the something, and allow ideas and solutions to bubble up, kinda like how people say get their best ideas in the shower, only done on purpose 
Meditation doing breath work is never wasted, it’s healthy and brings you into balance.
For meditation to build astral aka psychic senses, which is what you need to communicate with entities, we have a few posts and tutorials that might help. Some of them are collected together in this megathread: