This is a bit of a Zen thing you're describing. A lot of different approaches and theories on getting to the same thing here I would say. It's hard to think of specific advice here beyond "just start doing it" which does not seem very helpful. Maybe a good insight here is "practice will make it easier."
I think ultimately for me this mindset was cultivated at a pretty young age with some writing and art I happened to come across. I love content like that and seek it out now. I think you can become more and more growth mindset oriented with time. I'll share some of the things I've liked on the topic here, maybe that will be useful:
http://www.catb.org/~esr/faqs/hacker-howto.html
https://www.goodreads.com/quotes/7727986-mountains-should-be... (this is a quote, but recommend this whole book)
https://www.amazon.com/Mindset-Psychology-Carol-S-Dweck/dp/0...