Aren’t there privacy friendly OSes you can already install on your Google Pixel?

Kinda like Medium or WordPress (the .com variant). Gives you your own subdomain and lets you blog. Their policy is that they absolutely will not editorialise anything. It’s used by a lot of reputable good bloggers too

Personally found streaks to be very helpful. In fact, on the homescreen of my phone is a very popular IOS app called Streaks!

Maintaining streaks has helped me a lot in fitness, mindfulness and discipline in general.