Nah I struggle through similar reasons. I think most people do; it's hard not to when there's practically infinite access to information. For me at least, I find it's a matter of just diving in with a slight "f*ck it" attitude - if I later find out I didn't start with the "best" material, or that something doesn't interest me as much as I thought it would, I try to just cut my losses and move on. Personally, I find that "joyful learning sensation" is more a matter of mental perspective than anything else. For what it's worth :)