My poor 3DS is finally showing it's age

Had it since the release date (can't believe its 14 years old) and finally the thumbstick is disintegrating. Are these fairly easy to replace? I don't particularly want to damage it accidentally since it's my favourite handheld.

Had it since the release date (can't believe its 14 years old) and finally the thumbstick is disintegrating. Are these fairly easy to replace? I don't particularly want to damage it accidentally since it's my favourite handheld.