Hop-hop.

Mm, what else?

)) I can certainly suggest some more ideas. For example, here: http://lifehacker.ru/2015/08/21/17-geek-hobbies/
And I also don't have time to read books. I have a stack on my computer, from Gumilev's "History of the Huns" to "Encyclopedia of Tibetan Symbols and Ornaments"... All the topics seem interesting, but I just don't have the time: (

but I would still risk trading "steel" life in Ukraine for health.

Life is like that... suddenly unexpected. So if you happen to be trading, look for a companion (preferably a doctor). It's difficult to do it alone. And the medicine here is awful, even compared to Ukrainian medicine).