League of Legends (LoL) Question: Is Zoe a good champion to train on and get better with her?

Don't listen to anyone telling you what to play! Pick wahtever champ you would like, main this champ and improve with it. Just make sure that the champion is viable and that it's not getting perma banned so you can have the chance to play it. There are champions that are bad for maining/OTP-ing, because they have a lot of bad match-ups so they can be counter picked easily. That's why you gotta be paying attention to that, before you decide to main a it. Good for you that Zoe is not one of them, she's got good scaling, she is strong early game and you can pretty much beat every midlaner with her if you know what you are doing. Wish you luck and don't forget that League is a game and you are supposed to have fun!

First of all pick a role that you like, that will reduce the champion pool to a sizeble amount.

After that check for champions that could work as the training wheels for the role you wanna play. If you wanna start playing ADC Miss Fortune would be a better first champ to pick up than Kalista, who requieres a lot more of mechanical skill.

Some of the champs that are easy to pick up on all roles are:

TOP: Garen, Darius, Mundo.
JG: Warwick, Rammus, Amumu.
MID: Annie, Malzahar, Lux.
ADC: Caitlyn, Ashe, Miss Fortune.
SUPP: Leona, Sona, Morgana.

Zoe is a great champion to play, though she might be too difficult to learn with. She is very skillshot reliant and so playing with her early on you might not be able to get anything done. She also has some difficult mechanics with learning how to use her Q and R in conjunction.

A good champion to start with might be Dr. Mundo. He is really good for learning the basics of the game. He only has one skillshot with his Q, he heals a lot, he has an auto reset, and good AOE. Once you feel comfortable with being able to abuse his kit (especially the Q skillshot if you want to learn Zoe) then it will likely be significantly easier to learn her.

To directly answer your question, there is absolutely nothing wrong with maining Zoe, she's a very powerful champ capable of snowballing with a lead or coming back from a deficit. It's definitely worth it.