We have a collected list of ways to contact entities.
There’s no rule that you “should” use an enn - enns are from the modern religion of demonolatry and don’t exist for most entities, just so you know.
Personally I never use enns because I don’t hold with worship as a concept, I don’t trust the intention carried with an enn made by people who’s philosophy I disagree with, so I stick to the centuries old sigil.
The top list has methods that don’t need you to have developed your psychic senses to hear the answers.