I was an athiest for a very long time and you could have never told me I would be a christian let alone a methodist. My church is nuts and everytime of person goes, tatoos and all.
For me it was a feeling. I had something very bad happen to me and I was shown there was a higher power. Sometimes I have doubts which is perfectly normal. we are supposed to.
If you just ask "show yourself to me, give me a sign" something might happen.
No matter..........to me life is energy, people give off energy......feed off of that. IF they mention a Higher power then thinkg "energy". Giving it to your higher power is like releasing it out to the stars, just something bigger then you.
I hope that helped a bit. I struggled with the higher power for a while.