What should I KNOW?

Hey, Portland ppl! I will be moving near Beaverton/ Cedar Mills area come March first!! I am relocating from SoCal and have done some reddit research and Google searches for tips. I've got vitamin D and a Happy Light in my virtual cart. I've heard learning to layer is a must!

Are there any specifics you think would be helpful? Do I need to buy tire chains? Is that a must? (Never driven in snow. But it seems to now snow more often there?) Can I (an under 5ft female) go for a jog alone? I'm coming from the hood, and only run during daylight here. Give me your knowledge!! Thanks all!!!