YES YES YES. So true that comfort zones create limiting beliefs in our minds, but when we're presented with an opportunistic springboard we can leap over those thought hurdles even though it's scary.
I always wanted to be a programmer/hacker since I was young but had limiting beliefs for whatever reasons formed them along the way. However when I was finally presented with a problem I needed and wanted to solve so badly it burned, I was able bypass my self doubt and learn the things I needed to learn in order to build what I needed to build.

Good luck with writing your book brother, I can't wait to fucking read it!