How to be prepared for the shark/demon phase 😭 my pup is 8wks old

I’ve had my 8-week-old female rottie for almost a week(she’ll be 9wks soon). So far she’s been the embodiment of a perfect angel. She sleeps in her kennel and I set two alarms for potty breaks and she goes right back sleep when she’s done relieving herself. She naps without protesting. I feed her all her kibble through training and she knows sit, down, stay, kennel, “go chill” (this is our version of place), paw, and heel. She doesn’t know them all perfectly obviously but when she’s working for food she’s pretty damn close!

I have read soo many stories about puppy blues and how bad it can get. What are things I can do now and keep doing to be prepared for the teenage phase and all the chaos?! I can already tell I’m going to miss my angel if it’s as bad as they say 😭