Overall, then, sounds like generally good news. No surprises there about your fluctuating mood and energies, End - think what you've been through and continue to face, after all.
Sounds like the teaching course is - yes, weirdly - apposite in timing. Possibly counter-intuitive, that, for many people in a similar situation as you, but oddly, I have a gut feeling (without even 'knowing' you really) that it is likely to be quite therapeutic for you. And what with the current personal scene for you, I well imagine that you will be engaging at a deeper level with the, um, 'material' AND your students.
Yeah, keep looking after yourself too in all the good small ways.
Vic