Summoning? Summoning what?
From what I understand, summoning... anything is very difficult and occasionally dangerous. The fact that you're even asking tells me that you don't know enough about it and probably aren't experienced enough for me, or hopefully anyone, to encourage.
I would suggest that you do a lot of research on your areas of interest, AND the basics.
Jumping in to something as advanced as summoning (daemons/dragons/spirits/whatever) is likely to be disappointing, and like I said, potentially, dangerous.