Forgot to mention its the tower version, a desktop.Welcome to the forums, newcomer!
but failed with it fititng
What ram kit did you purchase?
You should be looking at DDR4-2400MHz SO-DIMM sticks. A dual channel 2x8GB DDR4-2400MHz 1.35v kit should be a good kit to upgrade to. As a side note, please make sure you're on the latest BIOS version for your laptop prior to the ram upgrade.