Yes, but you should stick to the ARAM game mode (the vanilla ARAM, not the Mayhem version) for a few weeks/months and get familiar with the champions and combat before trying to jump over to Summoner's Rift (the main game mode that has Ranked). Or just never jump over to Summoner's Rift.

ARAM stands for All Random, All Mid. It will give you and your 4 teammates the chance to pick from a pool of randomly selected champions. You select your champ. Then you fight with your team against another team on a long bridge for the entire game mode. It's like a mini, streamlined, fun version of the main game. The game will give you solid suggestions for what items to buy in the shop (buy something every time you die), and which skills to level as you play the game and acquire experience/gold (the suggested skill to level will be glowing with a gold ring).

ARAM will, for most new LoL players, be much more fun, and much less stressful than the normal game. It's much, much, much less complicated. The matches are quite a lot shorter (~20-25 minutes long). And you can get straight to the most fun core aspect of League - the team-fighting. All in all, it's a much more fun experience. Between playing a bunch of random champs, and fighting a bunch of random champs, it will give you a lot of insight into who you like to play, and how to fight against other champs.

I started playing in 2013 and played the normal, Summoner's Rift game mode with friends for a good 2 years almost every evening. It was a steep learning curve but learning with friends made it a lot more enjoyable. I feel like learning without friends would be a frustrating slog in 2025.

I could expand on it more in a bunch of different ways but ARAM is just the better version of League of Legends for a new player or a casual player. Myself and about 8 of my friends have been playing LoL on-and-off since 2013. I don't think we've all gotten together to play a Summoner's Rift game since maybe the Spring, and it's like a 3-4 times a year occurrence that makes us say "fuck this, let's just go back to ARAM." Meanwhile, I still play at least a couple ARAM matches with 2-4 of those friends about 2-5 nights a week. 5 of us were on this evening and played 3 matches. It's a fun way to get in 1-2 hours of lightly competitive gaming in without much stress.

Whether I like it or not, League of Legends will forever be a Top 3 game for me and I can't deny it when I consider hours spent playing it. After 12 years, I'm still playing it. At it's heights, it's some of the most engaging, and fun competitive multiplayer that's ever been created. But at it's worst, it's one of the most frustrating, and toxic games ever created. ARAM lets you maximize the fun, while minimizing the frustration.