I own the Kobo Libra H2O and the Boox Air 2, both are amazing for different reasons.

Kobo is small and portable, fantastic for reading in bed.

Boox Air 2 has pen support and runs android. Fantastic for note taking, large PDF files, and so. It is a bit big at 7in screen, pretty much a tablet.

I use iceraven, a fork of Firefox. Though I’m unsure of its availability on iPhone as I’m an android user.

I practice Northern Long Fist KungFu and Shaolin KungFu. I have also practiced Uechi-Ryū in the past.

I chose these styles because all have practical applications in combat and have been used for combat at one point during their existence. To me, this alone proves they’re useful to learn.

I also spar and have applied what I’ve learned to matches. So I do believe these styles are worth looking into and learning.

To bring it back to your post. Self defence is great to know wherever you live, even if you’ll never use it. Most teachers are very loud and use visuals for teaching, I don’t think you’ll have any issues.

My servers are on 24/7, currently they use about 100watts each (I have 2 running), which adds maybe $20 to my electric bill. I also have stuff such as mailcow, nextcloud, and mattermost running, turning off every night would make those applications useless.

I have a shit APC desktop UPS. It keeps them on for 10-15 minutes at best.