My Problem with the new map (from first impression)

Way too much is going on. Especially as a jungler

I played Diana jungle and these were the questions going throuigh my mind:

1. I wanna buff my smite but i'm a mage. What suits me?
2. Wait but I have no good cc. What if this smite sucks compared to the enemy's?
3. What if they counterjungle?
4. But the jungle is harsh. What if I buff my smite but can't kill anyone?
5. Why do I have this vision passive?
6. Why doesn't smiting chickens give me any buff?
7. Why can I see invisible enemies?
8. Why did i get shielded but lost it after I cross the turret
9. What if I fall behind. What do I build? Is the jungle item worth rushing fully?
10. Why aren't I ganking as much? If I keep ganking, i'll fall off since the jungle would be too strong for me. 11a. Why is Lissandra so freelo (obligatory lissandra post) 11b. Do I even need to ward?
11. Why do I feel like I have lower mana?
12. What is the point of buying Athenes when the price is increased and the mana regen is nerfed for the same stats?