I feel like it would be a bad idea to meet with such an entity. You could possibly summon him by completing some kind of ritual or you could think and call for him on the astral.
May I ask, why do you need to talk to it?
"I am going to seek help from Satan for something.
How can I find him by magic?
Is it dangerous to do that?
Is it possible?
What should I beware of?"
To summon stuff, it's quite simple honestly. Though I only summon angles for my needs and guidance if you truly wish to summon this vile spirit I must warn you, I doubt if you are a Christian that God will be very forgiving.
But your choice is yours. So, to summon something, say each syllable of their name about 30 times. (Example: my name is Mythic so you'd say if I was a spirit "myth myth myth x30 and ic ic ic ic x30)
I must warn you Satan is very tricking, and by summoning him you are messing with laws beyond punishment.
I suggest summoning Arch Angle Michael or having a bible/holy water just in case. That is if you're a Christian
Oh and I almost forgot to answer:
1. "I am going to seek help from Satan for something.
2. How can I find him by magic?
3. Is it dangerous to do that?
4. Is it possible?
5. What should I beware of?"
1. Seeking him for help in my opinion is very pointless, he only wishes your soul.
2. Like said on my previous post above
5. He will try to help you, be your friend, in return for a very dangerous price... your soul