I’m a teacher. In very clear and obvious ways, my works “matters”, and I have the privilege of living my values every day. Paradoxically, I am increasingly sad

I’m a teacher. In very clear and obvious ways, my works “matters”, and I have the privilege of living my values every day. Paradoxically, I am increasingly sad and angry (which is not my natural disposition) about my work and very well may be on the path to burning out. My wife and I are actively planning what will happen if I don’t return to teaching next year. What’s our runway? What will I do? (UX? PM? Sales? …?). Would it be possible to find a position where I can work 20-30 hours per week and be more present for our young son? Or - should I try to maximize income to make up for years of never making more than 45k? I have strong emotions about all of this, but having a higher purpose is only so sustaining.