Relatively New To Overwatch. What Are Key Fundamentals, Strategies, and Tips That Would Help Me Learn the Game?

Before the reboot, I had only played overwatch casually for a couple of weeks and never learned the ins and outs of the game. I’ve come back to Overwatch on the Switch and am loving the game. I want to get to the point where I’m really good at it, but I see most guides are before the reboot.

I have experience playing competitive team based games. I have 10 years of playing League of Legends so I’m not new to working as a team. I used to play a lot of Call of Duty and Battlefield, but haven’t touched these or any shooters in a very long time.

What do I need to know to get good at this game?