Short VOD Review request, Thanks!

Hey, so i was playing some Gragas top against LeBlanc, and if i'm being honest with you i have little idea of how to lane against Leblanc, i don't think i've won that lane once, but i haven't laned against her that much, propably 5 or 6 times.

currently Gold 2 on my other account, peaked at Plat 1, everytime i have a question here i've been told to send a VOD, so i guess here it is

If anyone can tell me what i should've done better during this early laning phase, i'd greatly appreciate it, Thanks!

https://www.youtube.com/watch?v=IVn57IeYIqU