If u order online, make sure it is from a reputable seller. There are many selling used or faulty RAM sticks.

Anyhow, as long u know how to open the access port covers or disassemble the laptop, it is easy to upgrade the RAM.

Do Google for the service manual for your laptop first. Study it and then make the order. Wear a anti-static glove if u worried killing the sensitive chips on the motherboard.