The first thing you should focus on as a new jungler is not falling behind. I frequently see inexperienced junglers who fall 2 to 3 levels behind their teammates and they don't understand why their ganks are ineffective. You should look to be the same level as the ADC/Support when you are jungling. If you start falling behind in levels you need to focus more on farming and less on ganking or your ganks will not be as useful to your team.
The next major thing is map awareness. Do not focus on the jungle camps unless you are at risk of them killing you. Your eyes should be constantly darting to the minimap to keep an eye out for any sign of the enemy jungler. You can also watch motions of the opposing laners on the minimap and see when they move towards a brush to ward it. Make a mental note when you see that on the minimap and don't gank from that direction for at least a minute.
The easiest way to gank is through river. You should use this ganking method any time the enemy laner is pushed up to your tower. This method of ganking is usually ineffective if the enemy laner is pushed under THEIR tower.
If your team has the lane pushed you can still gank using a lane gank. This involves moving from your outer turret to the nearby brush against the wall when the enemy minions aren't within vision range of you. As the wave pushes to the enemy tower you can move through the brushes and wait until the wave bounces off the tower and begins to push back towards your team. These ganks are especially effective if you teammate puts a pink ward in the lane brush or sweeps the brush before you arrive.
A third form of ganking is counter ganking. This is probably the hardest form of ganking because it requires you to have vision of the enemy jungler or anticipate where they will be. The best way to do this is place deep wards in the enemy jungle when you know he has recalled or when he is trying to gank a lane on the other side of the map. With counterganking you stay in the general vicinity of the lane you think is going to get ganked (you can clear jungle camps in the area) and then immediately move to assist your ally when the enemy jungler tries to gank. This form of ganking is extremely effective if you have a gold lead over the enemy jungler or if your ally has a gold lead over his opponent.
Kindred is not an easy jungler to learn but if you enjoy playing them then have fun with it. Warwick and Nunu are the easiest junglers to play but I don't find them particularly interesting. My favorite junglers are Diana, Shyvana, Vi, Malphite, Amumu, Kayle, Sejuani, Zac, Rek'Sai and Pantheon.
I recently played a Kindred Jungle game that I posted to my youtube chanel. You can check it out here to see how I gank with them (and I ganked A LOT that game.)
https://www.youtube.com/watch?v=H7d2jAc0jIw
Alternatively you can just check out my channel if you're interested in other champs. Feel free to leave comments in the videos if you have any questions.
https://www.youtube.com/channel/UC2EZm50wNGmfJal7IHM_b8Q