You choosed on your own to install beta rom. Now, since you read before installing how to submit bugs helpfully, do it this way.
My first suggestion would be to clean your lense with some lens cleaning cloth.
Wait, what? Are you sure you are in the right thread?
Screwed up what exactly? It's mentioned in the first post: Non-carrier versions only
What do you think?
Then i would refer to this article. Most likely they are better ones out there, but personally it seems pretty informative....
It's called beta for a reason
If you are asking how to use the beta channel, you shouldn't use it in the first place. Beta versions are released to help find bugs
How much time did you gave auto brightness to optimize according to your needs?
So you are opening the app, you waited for several seconds and it still doesn't shows you the camera UI? Did you sideloaded any not supported apk for...
1) Restart your device
2) It's the first open beta release
Did you try to restart your phone once?
You know how android optimizes since Android 8/9? Charge your phone up to 100 and do not disconnect it while it idles at 100, afterwards it would...
Check it once again, you should find it as described before
It should take several seconds to open apps, after all they need to load. But what exactly do you mean with hangs?
Do you have apps installed...