I know the feeling. Literally posted this on Stacker News a couple of hours ago:
"...And battling fatigue / lack of motivation in the face of uncertainty in terms of how much any of this work actually means to the world. In any case, slow progress is better than no progress and I have done some incremental headway on most of those tasks..."
But I also keep in mind the following quote:
“The writer must believe that what he is doing is the most important thing in the world. And he must hold onto this illusion, even though he knows it's not true.”
― John Steinbeck
And listening to David Goggins always fires me up. Hearing the stuff that he talks about, from a guy like him, it's much easier to accept and embrace the fact that we must go through these deep, dark dungeons & face the dragons in our souls, alone and constantly. It's not "follow your bliss" BS. It can be, for short moments in time, but it never lasts. Mostly, doing something meaningful and especially doing something novel and meaningful is hard work and suffering and it's never truly clear if and when any of it pays off. But then, the question of faith and belief (as per Steinbeck) comes to play.
I'll leave you with these, in case it's of any help:
https://www.youtube.com/watch?v=nDLb8_wgX50
Take care, brother! 💜