Do you know the spirit visiting you?
I am a newbie as well. As for me, I have my stepsister & my father following me. My stepsister, I just knew. I have been aware of spirits, even as a young child. I can't see them, but I can sense them & feel their emotion & energy. My sister died when I was 12. I was extremely close to her. I had a recurring dream for 2 years with her in it & I have been looking at the clock at 11:34 every day since then (I'm 40). I can sense her on my right.
My father is on my left. I never knew him in life, & he died when I was young. I could always feel a presence, usually on my left. Sometimes I would feel a tap on the shoulder, or a brush of the hair, or just the presence. I asked a psychic friend when I was in my 20s & she told me it was my father. It just felt true to my heart, so I knew it really was him.
So, if it's family, you probably know with your heart & your gut who it is.