Helping me choose a new champion

Greetings, I have recently gotten back into the game, and I was wondering if people might have some advice on a champion to play or acheatype to play based off of some of my previous experiences.

I previously have mained champions such as Mordekasier, Riven, and Diana. Though I name these three as mains previously, I have played almost every champion Though I do not mind putting a good deal of work into learning a class (half the fun of games for me is doing it on paper), I am not particularly skilled. I have played a lot of vayne in the past, and I enjoy her, but frankly I suck at playing her after 200 games I really enjoy split pushing and dueling I generally prefer mid-late game champs. Hypercarries are too much of a risk, and get bullied to hard to early, I would rather have a fighting chance of at least surviving early game I am always open to learning new playstyles and strategies if I know the mindset I am working towards

Any input or advice is much appreciated, thank you.