I think you should continue pursuing
as she's a great mage to learn with in mid. Lux is all about her positioning. If you position well, you'll warp teamfights in your favour and never die. Position poorly (on such a squishy champion), and you'll die whilst being ineffective.
Positioning well in fights allows you to double snare priority targets with Q, zone a major portion of the fight with your AoE E and gain full effects of your W on teammates. Hitting skillshots is inherently tied to how you position within fights. If the enemy can only approach you or your team from one angle successfully, then your job is 100x easier.
Do note that her waveclear is quite poor for a mid mage, so learning to CS with her and prep waves can be difficult at first.