If you are jungling in low level games I am not sure how reliable teammates will be in helping on the early leash, so I would really just play something that clears easily like Warwick or Nunu. You start at a major buff (red or blue, typically the one on the bot side so that the bottom lane can help with leashing the first camp) and just kind of go around the map. Farm what you can when it makes sense in the jungle. Try to understand which camps your champion should gravitate towards if possible (if you only have single target abilities maybe put off doing the camps with lots of mobs, particularly the razorbeak/raptor camp next to the mid lane). While you are jungling try to look to see which lanes you think you can gank and head there when you see an opportunity present itself. Use wards to follow the enemy jungler and roaming characters so you can know where to be. Objective control for things like Dragon/Baron are important, and if possible try to kill the Rift Scuttler wandering up the river when those are coming up, or you can head to it if you are low on HP and need to kill something that will not attack back early game. Sometimes you have to know when to let objectives go and when to fight for them. For dragons, if it's not Infernal or Mountain maybe don't worry so much about losing it to the enemy team. Smite gives HP back so if you are fighting enemy champions in the jungle you can smite monsters nearby for a slight HP edge. Generally speaking though you are last hitting with Smite to secure objectives in the jungle.
