There are well over a hundred League of Legends champions. Some of them are really poorly suited to newcomers because of how complex they are. You're better off sticking with simpler champions that let you focus instead on learning the overall strategy and feel of the game.
These nine characters are perfect for newbies. Each is straightforward to play but also really powerful. They're a great way to get accustomed to the game and the various roles you can occupy in it. You may find yourself still using these characters even if you've been playing for months or years.
Master Yi (Jungle)Jungle is a tricky role to learn but Master Yi has the ultimate training wheels. He can clear camps quickly and easily thanks to Alpha Strike and his healing ability Meditate. None of his abilities require aiming either so fighting other players is a snap. He's decent enough at ganking lanes, too, provided your team's laner has some crowd control at this disposal.
Darius (Top)Darius has always been a fun beginner pick for top lane. He's strong early in the match and can seriously bully their opponent. His bleeds, slow, and snare set up his instakill ultimate perfectly. Darius' ultimate resets its cooldown when you kill an enemy champion so you can become a terror in teamfights. Like a lot of champions on this list, he's pretty easy to learn because you don't need to worry about your aim. His rework has only made him stronger by adding a healing component to his Decimate ability.
Amumu (Jungle)Tanks are always a good standby pick for top, support and jungle: they don't have many skillshots and they're so durable that you can survive a mistake or two. Amumu is arguably the best tank for the jungle role. His Bandage Toss is great for either ganking a lone enemy or starting a teamfight. He can also deal a surprising amount of damage to nearby enemies thanks to Tantrum and Despair. When he's in the middle of a pack of enemies, he can also use Curse of the Sad Mummy to freeze and damage all enemies - a move that can potentially win the fight for his team.
Wukong (Top, Jungle)Wukong, like his mentor Yi, doesn't have any skillshots in his ability set. Unlike many other Fighters, he doesn't have to worry about kiting thanks to his dash. Decoy is a great escape tool that can also be used to initiate a fight, while his Passive makes him tankier than expected. The AOE knock-up effect from his ultimate can win teamfights even if he's behind in gold.
Jinx (ADC)I think one of the hardest things for new carries to learn is how to effectively farm minions. Jinx, however, can clear single or waves of minions effortlessly thanks to her rocket launcher and minigun combo. The stacking attack speed of her minigun, meanwhile, makes her great at taking down towers and other objectives. It takes some practice to effectively use her ultimate, Super Mega Death Rocket, but with a little practice it's great for getting kills on a foe that thinks they've escaped or helping allies in other lanes.
Ashe (ADC)Carries are expected to be the big guns that steamroll the enemy team at the end of the game. Ashe is slightly different in that she's great at setting up teammates' kills as well. She can slow enemies with auto attacks or Volley so her allies can chase them down. The stun from her ultimate is likewise a great alley-oop. Hawkshot lets her spot a jungler or scout objectives. Ashe is a huge help to the team even when she's not killing enemies left and right.
Annie (Mid, Support)If you ask pretty much any player to recommend a good midlane champion for beginners, Annie is on their shortlist. The reason is that every one of them has lost a game thanks to an Annie. Her ultimate lets her summon Tibbers, a giant teddy bear, to smack enemies while her passive lets her stun targets every 4 spell casts. By combining the two, she can drop Tibbers in the middle of a teamfight to stun and damage several foes at once. This can be enough to turn the fight - and potentially the match. It's so effective even though everyone sees it coming.
Leona (Support)Leona is one of several support character that excels in initiating fights. What sets her apart from Nautilus, Blitzcrank and Thresh though is that her initiate ability is a lot easier to land because isn't blocked by walls or minions. She's also very tanky, significantly boosts her teammate's damage thanks to her passive and can stun enemies on command with her Q ability. Leona helps her team in so many ways that every player with an interest in the support role should check her out.
Morgana (Mid, Support)Morgana is one of a few mages that can be played either mid or support with success. It's pretty clear why she's great in either role. Her passive heals her when she lands a damaging spell so she can stay in lane for extended periods of time. Tormented Soil is great for clearing packs of minions. Dark Binding's root sets up easy kills for her or a teammate. Black Shield, meanwhile, is a great "oh shit" button that can prevent several deaths throughout the match.