OK, Kindred main here:
I play both lane and jun so I can explain in depth the difference:
-
(*him him him him)- them. but since you control lamb and if you want to individualize gender then it's- her. same as
or
or
or
... difference is- the name is made for both entities. Would be lame if there was a champ just named lamb, wouldn't it?
-
Marks:
When jungling, mark enemy jungle as soon as the game starts, by the time you're lvl 3 you can change mark according to situation.
jungle- you get first mark almost as fast as it spawns (scuttle) and maybe, invade even. The early power spikes are good to take down enemy jungler who is low hp fighting vs jungle (2 marks BOOM). Try invading the side where scuttle spawned. smart junglers try to contest your first mark if they are early aggro

Devourer
: yes the fact that it procs only every 4 shots sounds bad, but for Kindred that's not really the point. W damage scales off ATT speed, CRIT and marks of the
chance. And the on hit magic damage covers for low base AD, which is nice.
Warrior:
AD+10% CDR- both useless stats on her early, and jun clear is slower. you need that att speed, bruh.
only spell that actually benefit from CDR is W.
My best games were maxing W first.
In W you still get Q on 2 seconds, so no point in maxing Q first.
mastery: 12/18/0 thunderlord (duuh. Q procs 2 hits for mastery)
example build (in succession order):

should finish game by then:
you can swap potions later on to a situational item
(that one pesky tank that won't die).
is situational. But i like to have it because i always expect to have atleast 9-11 marks lategame.
If it's your not your cup of tea, get
(armor pen, and active) I sometimes throw it in as last item to swap potions.
Lane:
ADC: you don't have
, rush
and take
best having supp with cc and/or heal.
Marks: you want to mark support first, especially if they are squishy.
you bully your lane, and support usually dies first because if you harass adc too much, support might sacrifice himself to save adc, and if you see that supp is smart, you can swap mark.
Botlane you can get 1-3 marks fast (scuttle next to drag or enemy jungler) other than that, rest of the marks are hard to reach and you end up with like 4 by 20 minutes (i get about 7-10 in jungle. freedom of not being pinned down to botlane or any other lane. MiD- second best position because of early roam).
Mastery: 12/18/0 same as jun.
build:
(sorry, to lazy to explain situational items and what to swap with what. long post TL;DR)
Lane 2:
Top lane:
here you can go same way as adc, build wise, but top usually has high sustain high damage champs, so you focus more on staying alive.
Mastery:
12/0/18 (keystone- Grasp of the undying) literally a copy of your w passive vs enemy champs.
off-tank is the only time you build
because you add
and that makes base AD bearable for 
build:
or
last item depends on weather you have the lead or no.
options include:

TL;DR. easier to carry with Kindred from jungle, because you can grab the lead and snowball hard, and you have quite a few escape/ survivability tools