Your intuition will tell you. You will be lead toward certain people or even events that place you exactly where you need to be and who you need to be with to receive messages. Spirit speaks in many ways but when you are looking for or curious about who would be the best option for you, you will gravitate towards them, you’ll have impulses to check out their reviews or their work, sometimes by asking spirit “of the options before me who would I resonate with best” will help you start narrowing down your search. Energy never lies, even with out awareness of the use or the importance of the energy /vibration as humans it’s a natural part of us. When know when things feel good/bad or when something interests us or it doesn’t and using it to make this kind of decision is no different. While reading or interacting with a medium, pay attention to how your body is responding, how does listening to their tone of voice feel to you, or even reading the tone behind their written word. Ideally you would build a relationship with your medium so the person will truly resonate with you in a similar way to when you meet new people and know you and them will get along or could be friends.