That is the prinnciple of the jutsu.You now know it.Train with a clone to get the hang of it fast.As the weak lightning jutsu is released, I form a short sequence of hand seals and raise my arms, I then face them toward the oncoming jutsu, as the jutsu makes contact with me, I absorb the lightning chakra from it and reserve the lightning for my own lightning technique.
I could use the avatar to fight at close range for me while I am perhaps hiding somewhere.