I’ve been in one car accident in my life (my fault) and it shook me up, I remember searching “how long until self driving cars.” But I got over it, next day I was back behind the wheel. As other people have said, it’s a necessary life skill for most people in North America and it does get much easier with experience and time.
Edit: one thing that helped me is to identify what I did wrong and how i could avoid it happening again. I have a motto of sorts, “never make the same mistake twice.” You can apply that to close calls as well. In your case, you say you struggle with multitasking, but that isn’t something that is out of your control. Especially while you’re still a beginner, avoid listening to music (and DEFINITELY keep your phone down) and keep your eyes on the road. And if you’re driving with other people, they will be totally cool with you telling them, “sorry I can’t talk, I need to focus on driving.” As time goes on driving will get much easier and you can probably allow for some (limited) distractions like music, etc
California king is smaller than a regular king actually! Alaska king is bigger though