First - congratulations on your new piggies 
Guinea-pigs are lovely, I've kept piggies from when I was 9yo - 22yo then reliving the GP love with the pigs my DD and I share.
They are prey animals - they have no defences . OK they can run (a bit) but compared to all the villans out there (foxes,cars,eagles according to some piggies
and snakes, according to mine) , not very fast .
They can't jump or kick like a rabbit.
Climb like a rat.
They have short cobby little necks so can't turn quickly to bite like a ferret.
They've come to live with you in a strange place. Strange noises. Different smells.
All they know is each other. That will be their only stability right now.
But - they are unfeasibly greedy little animals so their bellies with be your ace card.
Last year, we got two adult rescues sows who were very timid, our little pig literally had to be held in a body/headlock or she'd be away, whirling her claws as she went (ouch)
Her and her female cagemate are still apt to give us the runaround, piggies like to try to evade capture , but when you do catch them, they settle.
We try to edge the piggies into a box (or their rubber trug upside down) then they're cornered without pouncing on them and risking injury.
Wrap them in a towel when you cuddle them , it'll give them security and they are bound to pee 
My sows used to lard about in their haybox (I knew they rarely wandered about because the rest of the floor was unsullied). Maybe they did walk round till they heard me open the door?
Now we have GP6 in his cage inside the Pighouse, GP5 is constantly prowling round. She's always poking her tiny nose up at the side of his cage (she can't see in ). So of her own choice, she's become more adventurous.
We did give our pigs settling down time (well as long as I could keep DD away from them
) but the next day, she was cuddling them.
So - important things now.............
Boars/sows
Colour
Coat types
Age
And they need a MN nickname.
(And photos when you can)