In my honest opinions..being as biased as possible to the word "easy"
Bruiser:
Obvious reasons, you can build straight tank and do massive dmg.
Tank:
Building
and
makes you almost unstoppable and melees kill themselves
Mage:
a pretty simple to figure out Mage, High burst, A stun, a tank NPC with high dmg to spawn as ult. shields.
Assassin:
(Though she is a hit or miss as far as being effective) (
is also easy to pick up) Akali is a pretty easy champ mechanic wise to learn...Q your opponent then R AA R Q AA E R..basically around there..combining Q with AA is a strong attack since it procs it..easy to learn. Zed: He is a easy assassin to learn, and a gateway champ to micro management champs. But once you get him figured out he can counter about 90% of the champs in this games. He has a long range poke combo W>E>Q. and a long range engage combo W>W>R...or just to chase W>W or slows W>E.. or if you are being chased you can W>W ahead of yourself, then E whenever the enemy are on your shadow to slow them even more.
Marksman:
or
Equally both are pretty simple marksman with long range ults so you dont have to get too close. caits longrange piercing Q gives her good poke, as well as ashes W gives her long range AOE poke and slows constantly on every AA giving her the edge on chases.
Support:
Sona gives you almost every tool a support will need for beginners. If you are just getting into the support role and you want to figure out how things go bot lane without getting too crazy, sona is the way to go. She has a Heal, a MS buff, a Stun with her ult, and a pretty decent poke with her Q just to harass a little. shes a pretty basic beginner support
Jungler:
Yi as we all know and love, is a very very basic straight forward champ...he hits things, you have Q to dodge abilites or jump ahead and get into the middle of things, W to heal you whilest jungling (so you dont have to go back all the time)..you also have his E which empowers his Auto attacks, making his camp clear pretty fast, and then last we have his ult...the ultimate chaser, gap closing, DBZ fighting mode, ult. with Yi's ult you have the ability to make your presence in a lane known quickly, Yi's movement speed is increased dramatically and so is his attack speed. he is able to burst into a lane and Q and opponent combined with his E and start whacking away at an enemy while dealing tons of damage. Yi is a very viable beginner jungler. not much to him, just hack and slash