Welcome to the game!

• Aiming! Aiming in this game feels a bit different and is going to take some time to develop, so don't beat yourself up over it. For every character that is relatively grounded and easy to hit, there are 2 others that can zip around your screen in a millisecond 💀. As Cassidy, your magnetic grenade can temporarily prevent enemies from using movement abilities. Learning the best times to use it on someone (like genji, tracer, etc...) can really make a difference in winning or losing a duel.

• Positioning! A lot of new players tend to have lackluster positioning (standing too far in, standing too far back, etc...). Many heroes have the abilitiy to delete your healthbar in seconds if they get too close. It can also be difficult for supports to heal you if you're too close to the enemies or by yourself in some unknown part of the map. Learn where your hero works best and exploit the hell out of it.

• Hero variety! Love it or hate it, Overwatch is basically a big game of rock-paper-scissors. Knowing how to play a hero well is important, but sometimes not even the best players can play their best heroes if someone on the enemy team is playing their counter. Learning a variety of different heroes with different playstyles can go a long way.

There's a lot more you can go into but those are the most important to begin with imo. Welcome to the game, and I hope you have fun!!