Help! -- LeBlanc Season 7 (Patch 7.11) New Player --- Help!

So, I just started playing LeBlanc (2 games in) and I enjoyed her play style. Watching gods rocking games with her helped the hype. Although, as a new player (like 2 months into the game), lvl 26 right now. I feel it hard to participate in fights and make any impact mid-late game at all. compared to Orianna or Syndra, she's probably the hardest mid-laner I've played so far.

I was planning on focusing one champ for like a good 100 games in a row or something but I want to know if LeBlanc has potential to grow into something that I can 1v1 champs in when I get those 100 games worth of xp and knowledge in?

Here are my options: **Mid- **Syndra, Orianna, LeBlanc **Top- **Fiora, Kennen **Bot- **Vayne

List is based on the champs I've enjoyed playing thus far in each lane and really don't want to play "easier champs" cuz If I'm not enjoying the champ I'd rather not play.

Also, another reason to focus a champ is because I am super terrible at CSing right now but playing different champs pose an odd issue of all of them having different dmg to minions (AP is different than AD, Melee Fiora is very diff from Ranged Vayne).

So I just want to pick a champ, and jump into drills and games until I know them inside out and improve my **40% **cs to atleast 80%. But need advice as to which one would be a good choice for this. I just don't want to be 100 games in and suck still simply because the champ's too nerfed or something. you know? Like I loved the feel of being able to 1v1 a champ for the first time as Fiora esp when you can land the ulti perfectly on a running target and heal from like game 1. I still suck at her but you know what I mean. I don't mind spending time on a champ but if after say 100k mastery points in, if I still can't 1v1 with her or stand my ground, then that'd be disappointing.

Feel free to check out my op.gg (Soulhealer95). you'll see what I mean by poor CSing. Also, any other tips are appreciated!!! TY! :)