It isn't about motivation alone. Purpose is an important part of it... what's your purpose behind wanting to get the skill on non-fiction books... If the answer is to have more free time... then you're in a loop.
The way to have more free time is not to start anything new or different in the first place. Dig deeper why do you want to PhotoRead or read non-fiction books?
Find your reason you find your motivation. What motivates you is the reward you expect to get from your effort.
You could make it a game... then the reward is fun... what fun new facts can you learn from a non-fiction book that interests you?
Alex
