Can I jailbreak my own iPad mini 2 since I own it

See below.

Unauthorized modification of iOS can cause security vulnerabilities, instability, shortened battery life, and other issues - Apple Support

In addition, if you jailbreak any iDevice, you forfeit any support from Apple and any support here in these iDevice technical support communities, when you have ANY iPad issues.

You will be, basically, on your own to solve any of your iPad problems/issues.

FYI.

You can do anything you want to a device you own. But be advised it's a REALLY bad idea and should you ever suffer an issue, Apple won't touch your device and we can't help you here. It's simply not worth the risk.