lux
Lux is one of those League of Legends champions you can never go wrong with. In most of the situations, she's a safe pick and also a great champion to learn in order to climb up the ranked ladder. Lux's shiny abilities perfectly describe her – she is a mid-game champion you always get a chance to shine with.
Ahri
Ahri is one of the best champion you could main in League of legends. She's a great mid lane pick and has everything you need – damage, crowd control, mobility, and self-healing. Ahri is a fun champion to play and offers a lot of room for practice. And you can easily carry games with Ahri if you master her.