Good Champs to start to play lol (in my opinion) Patch 10.18

Pretty good tier list overall.
Dr. Mundo is definitely a great pick if your learning how to play the game with his healing and tankiness giving you a cushion, and he also still does a decent amount of damage.
Talon is actually a pretty difficult champion so I'd remove him from this tier list if I were you.

Nice picks of champions, most of these champions are easy to learn and get to adapt to them soon, specially Yuumi x) But Yuumi should not be all about healing since it is a waste of Mana. The Q of Janna isn't for beginners at all xD and Talon is not an easy champion to begin with....
Anyways, good luck :)

welcome

To be honest, Amumu is pretty simple and he taught me how to jungle effectively due to his simple kit. Although there is probably a good reason why you left him out. Hahah. I also consider Yuumi to be pretty difficult and probably now very newbie friendly, also Teemo in that regard since his kiting requires a load of skill and practice.

haha... I started with Ahri and Elise (I like spiderman .-.). Not really Newbie friendly xD
(It was 2 years ago and I played my 1st ranked with Elise and I was so bad that my allies asked me to go afk xd... I haven't played Elise since then. good old times :D)

I think morderkaiser is also a good choice or teemo, I would appreciate it if you add them, They are quite easy to use