Water fasting would be my best bet.

You can’t be in more caloric deficit and ketosis than by simply not eating.

Creatine works wonders when your brain is in that tired foggy state. 10 g and upwards in the morning do the trick.

I did the same switch some time ago. As a tech guy, I sometimes miss the plethora of options to customise your experience in Linux, but as a busy dad, I am happy that I don’t need to worry about fixing stuff after updating.

Go for a silicone mac (M1 and above) and I’m sure you won’t regret it - given you are fine with spending the occasional dollar for some cool software to polish your experience.