Hi, I won't make a crazy long guide as your jungle skills will come by jungling.
Sejuani is a jungler that can win the mid game even if you think you're lost in a deep despair with unskilled or drunk players. My build will show you how to build and how to bring sejuani in your foes nightmares.

If you start redside, then you're already in a good start.

Interrupt camps damage with your Q - Similar to master yi mechanic. Once you see the attack animation starting, use Q and it'll save you one AA on your face !

Gromp -> Blue -> Wolves -> Back. Try use only 1 potion. Now you can buy your first jungle item and wander easy in the jungle with the mana and hp regen from your wonderful smite.

Red Smite -> Check river to countergank -> Wraith (smite).



With this route, you'll brain most of the junglers waiting you on your red to kill you. Even if they take your red, they'll lose time waiting for you. They'll stay lvl2 while you'll be level 3.

If you're blue side, do the same starter. As the enemy jungler will probably think you'll start red.

-I would recommend you to keep in head that having one level ahead your enemy jungler is really important and it comes often by farming your jungle and probably mute all of your team challenger QQ.

- Gank the lanes with the least escape. I really love to camp mid as they're often the biggest flamers in the game and will impact the moral of the enemy team. Plus, it is super easy to get a kill on them with your burst even at low ranks.

- Rush the first jungle item and warmog and you'll carry the **** out. Dive bot or mid and make them rage. If you get enough kills you'll be simply a nasus with 1000 stacks with mobility, burst, tanking and CC.

- Ban irelia. lol.

Well you'll figure it out by playing her but I think it is important to say that you're carrying window is pretty short and belongs in the mid game or mid/late. But if you haven't done anything usefull till then, it'll be harder unless you do have a great CC/Burst team composition.