I'm also going to add that any online service you sign up for, always check through their privacy settings and make sure the options to not gather data are enabled. Another one is to check through settings for your ISP and cellular plans. Some collect various data to "enhance" services. Lastly I'll mention that on mobile devices switch to a privacy oriented browser like the recommendations below, and use Progressive Web Apps instead of native apps. These will include the browser's privacy protections by default.
Notamoosen
There's pros and cons to both platforms and there's plenty of people willing to argue each side. I wouldn't necessarily focus on this as much as trying to find the laptop she's most physically comfortable typing on. Also for an aspiring writer you may want to look into a screen that's easy on the eyes over long periods.
We have a 15 year old who started recently. Once we found the correct dosage it made a huge difference in his overall behavior. I found the testing to be trickier than administering the insulin. Ultimately I settled on the tester below, and found it easiest to get the blood sample from the ear tip. After about a week, we developed a good system for the testing as well. Best of luck!
AlphaTRAK 3, 8 Piece Pet Blood Glucose Monitoring Kit for Diabetic Cats and Dogs, All-in-One Solution for in-Clinic Or at Home, with Digital Results https://a.co/d/gvL9AcS
I personally use Niagara after years of Nova. I like it's clean presentation and the alphabet on the side to quickly jump to less frequently used apps. I will say though, if you've experimented with other launchers and still come back to Pixel, there's nothing wrong with that. It sounds like it meets your needs.