Here is what helped me:
Using Animal Empathy/ Telepathy every day for nearly two months.
Increasing your energy sensitivity helps with communication. I was using the practice in this blog post. The Dreamweaver Card System can help you increase your sensitivity too. You can find all cards in this post. Used the Energy Expansion every day during that time.
I used the Intercession videos from Dream Seeds and asked the beings to help me communicate with them and with my servitors. Described some of my experiences here.
Also check out this outstanding post by @uial. Communicating with your servitor is another psychic skill. I highly recommend reading the whole thread, it helped me a lot:
https://forum.enlightenedstates.com/t/psychic-development-questions/2260/9?u=conkerryan
The new course is designed to increase your energy sensitivity.