Default New Pebble User seeks help

Hi, just got my Pebble earlier and firmware upgraded to 2.0.1.

Hope someone can help to answer some of my questions :

1. For Whatsapp, is it that the notification will only show the group name?

2. How can I delete the old notifications?

3. How do I know when to stop charging? Don't think there's a indicator.

4. When at night in my car, after a notification comes in and backlight goes off, which button should I press to see the notification on the screen?

Thanks in advance.

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