You have to make contact in person, same as meeting another human. This is what evocation and invocation are for.
Here are many tutorials here and many ways, you should read through them all and then try one that feels th emost accessible to you. I suggest the sigil method:
Very important: learn how to banish first. Sometime the connection is taken over by a parasite and you have to clean your space of them before you start to help make sure they don’t, and also ow to get rid of them if they do show up. Parasites always lie and are only good for feeding on you without giving anything back in return, so you must avoid them as much as possible.
I recommend the first book in this thread, as this will also reach you energy working, how to feel it and read it.
Unofficial Tutorials: Spiritual Hygiene & Defense Basics Collection