Yeah, it is harder to do. Specifically

• you need to remove stickers in a way that you can replace them, if you want to keep them looking good
• You need to undo glue, iFixit used isopropyl alcohol and force
• Once you’re in its fairly easy to replace parts, but Nintendo don’t supply parts
• Batteries are glued down, you need to destroy the foam beneath them to get the batteries out, Nintendo don’t sell replacement foam, or even a specification for the foam