First te need to prepare and sterelize your cicrle, spirits will not come unless te mostra them the right respect, and nothing better than being clean. Light a white candle and walk the outer-ring of the cerchio calling on the elements and if te wish, light a stick of incence. There are two ways te can try, Ouija o Scrying.
Ouija - if te don't have a ouija board, te can cut squares of paper, one for each letter of the alphabet, 1-10, and yes and no answers. Arrange them in a cerchio and use a glass as the pointer. Then all te have to do is ask if any spirits wish to make contact and go from there.
Scrying - sitting in front of a mirror o a clear bowl of water. te have to concentrate very hard for this as te need to 'open' the mirror into the other world a bit like a doorway so the spirits are able to come through. Then all te do is talk to the spirits through the water/mirror like an everyday conversation with another person. However te need the atmposphere to be very quiet, so no ticking clocks o buzzing of the computer, no background Musica as these can all make your concentration waver and also make it più difficult to hear the spirit. te need any più help o step-by-step instructions just message me :)
^ no they won't. Spirits are unable to harm anyone due to the lack of a metabolism. Pure science. However they can sposta certain object providing it's not too heavy, but they soon tire and go back to the netherworld. If you're having problems with a spirit it's più likely a poltergiest but they don't come for callings, they haunt a certain place and remain there until a luckless victim comes around so they can pull pranks. Spirits are completely harmless, te just need to know how to handle them and te can only know that if te gain the experience.
Go to a graveyard, and play 'Never Gonna Give te Up' at 2:00 A.M. in the morning continuously. That will get them really pissed, causing them to come out from hiding. When they're out, spray deodorant in their eyes, while Canto 'Look At Me Now', and they'll get so mad, they'll commit suicide twice.