As a beginner, you don't need to worry too much over complex routes. You can go to each camp and clear normally, just remember that:
- Raptors are the deadliest and you could die to them - I usually just avoid them unless I have AoE dmg like

- Krugs are slow to kill. If you want to be really fast, you can skip over them.
- Scuttle crab is useful to provide vision, so get it when you can: but watch out for enemies while you're there. Try to imagine: If I was the enemy jungler would I be coming here? etc.
Regarding ganks, I usually just pop over to lane in between my clears. But if you see a good opportunity, you can go straight to gank. Remember that ganks will cause you to fall behind in level as you could have used that time to kill monsters instead. If your gank is successful, it's common to "tax" some minions from your laner to make up for your lost levels. This also helps to push the wave to enemy tower.