If you don't have a history of worm problems, don't worry about it. I never wormed my guineas, chickens or turkeys. I never see any signs of worms and am not concerned about it.
I never tried to tame my guineas. I did teach them to be herded into the coop. If I needed to deal with an individual, I would use a large net to capture it.
Some people recommend wrapping the guinea in a towel to be able to handle it.
I would remove the guinea from the net by holding both...