most streamers (who you can find on the league of legends portal on twitch.tv) stream well into the early hours of the morning, while korean competitive events typically start at around 5:00-6:00 AM EST
the closest thing to smogon for the LoL scene is probably the league of legends subreddit tbh
other quality websites that put out good content are teamliquid (where thorns writes), esports central (where I write), cloth5, gosugamers, and many many more - but these are almost entirely esports related and are not noob-friendly
if you are learning the game still and want to find an instructive streamer, i highly recommend voyboy or scarra
youtube user fiss mortune also regularly uploads full games from popular streamers to youtube and can be watched whenever
Thanks! might spend some money on skins but there's not many I like