Kindle Paperwhite 1 Jailbreak

I am trying to make sure I cant jailbreak my kindle. Not that I dont want to, but to make sure I cant, so I can stop trying :(

I have a Kindle Paperwhite 5.6.2.1.

Am I correct in assuming I can not jailbreak it without opening up the kindle?

Just want to make sure, if I can, then im doing something really wrong, and ill tell you guys what im doing, and the errors im getting. Thanks in advance for you help! :thanks: