Hi guys! I'm here to teach some beginners or even mediocre junglers effective jungle starts.

The most standard start right now is to start at the big buff near bot. (Red on Blue side, Blue on purple side).

Blue side Start 1 (Giving top lane xp advantage):
1) Take wraiths with the assistance of your bottom lane duo. Give wolves to top and get mid to help him.
1a) You could also start with small golems if your wraiths have been warded and you want to be unexpected. Get your bot lane duo to help you and give wolves to your top with the help of your mid.
2) Take red buff with the help of your bot lane. Don't use Smite.
3) Go to blue buff and solo it + smite it.
4) Gank top or mid.
5) Back / Gank again.

Blue side Start 2 (Giving bot lane xp advantage):
1) Take wraiths with the assistance of your mid laner. Give small golems to your bot lane
2) Take red buff with the help of your bot lane. Don't use Smite.
3) Go to blue buff and solo it + smite it.
4) Gank top or mid.
5) Back / Gank again.

On purple side (give top lane xp advantage):
1) Take wolves with the assistance of your bottom lane duo. Give wraiths to top and get mid to help him.
2) Take blue buff with the help of your bot lane. Don't use Smite.
3) Go to red buff and solo it + smite it.
4) Gank top or mid.
5) Back / Gank again.

The most important part of this process is to give a jungle camp to your top laner or bot laner. I'm sure many don't understand the importance of this. Giving the laner earlier XP almost always ensures a level advantage. If you choose not to your laner will essentially be forced into playing passive at level 2 and remain at lvl 1 for an extended period of time, in which the minions will push and leave the enemy top laner to go back for an earlier purchase.

Enemy teams can give jungle camps to their laners and if you don't you'll be setting them behind the enemies. Besides, you have relatively little to lose as the jungler. The XP is minimal and won't get you specifically at certain levels. You still hit the key levels at good times, (lvl 3 after clear, lvl 4 after first round of ganks and 2nd round of clears)

This jungle clear also greatly sets you, as the jungler, ready to gank early and respond early.

Hope this helped! :D