How to get into watching eSports? (New Player)

Hi everyone, I have never played league of legends but I would like to watch pro matches.

The problem is I don't know what is happening in the match. I know the basics like level up, destroying the towers, gold to buy abilities (although I have no idea what those abilities do).

So my question is, How do I understand the game enough just to watch pro games? Keep in mind that I have never played league, I am a complete noob. Thanks!