Know when your turn is. Yes, I know it’s a confusing 3-way intersection but just watch the people ahead of you. They go, then the other guys go, then the other other guys go, then you go. Simple.
Do not turn right when it’s the other other guys turn just because they aren’t going into that lane.
If the guy in the lane next to you has gone, this means you were not paying attention and you have missed your turn. If no one else is moving and everyone is looking at you, it means you have missed your turn. Other cars will at that point start moving into the intersection. Do not, at that point, dash into the intersection and cut everyone else off. Fucking wait 10 seconds and go at your next turn. This is not hard.
Do not turn left in front of someone going straight or turning right. You do not have the right of way.
That lane is for turning only. See how it becomes a wall after the intersection? I’ll not be letting you ahead of me when you decide you want to go straight.
Do not assume that the rule is “Whomever can make it into the intersection first wins.” This will get you killed. If not in crash, then later on when I’ve followed you home.
If your grandma or grandpa is a kazillion years old, has giant glaucoma sunglasses and a big hat and can’t really see over the steering wheel, it’s time to take the keys. Really.