No I dont think its too late to start playing. Although I would suggest to only pick it up if you have a group to play with. I cant stand playing the game solo anymore and Ive been playing League since Season 1.
My favorite is Project, follow by the Star World the lore behind is really good So, it's not too early or too late. Don't start with me. Waste of time.
It's kinda hard to get the hang of it Alot of people use smurf accounts and ruin the beginner experience It was very hard for me to learn the game but just go for it! preferably with friends