I'm sorry you're feeling low - it's so hard right now to get out of any kind of rut, so just by identifying that you need to is a good sign.
I went through similar a few months back, very unmotivated, anxious and numb to any enjoyment.
There were a few things that helped me:
1/ I took a few days leave to just get my head together, be on my own without kids or husband. It really felt long overdue just to have some time where i wasn't rushing from work to home etc.
2/ I realised that i'd been lurching from crisis mode to crisis mode with the lockdowns - so a new one was called and each time i'd sort of think - lets just get through it. So that meant I never adapted to any - which meant all my previous self care stuff (gym, eating properly) went out of the window. When I accepted that lockdown was going to be here to stay, in some form, for a while, I started adapting better - cooking meals again, making sure I went for a run or walk when i could at lunchtime. Maybe you've also been in crisis mode (like a lot of us) - so now might be the time to start thinking, how do I adapt to this so that my mental health has at least some degree of priority!
3/ audiobooks - for me these are amazing for distracting me.
4/ put limits back on phone scrolling - so no phones in the lounge in the evening for example. I'd really zoned out for a while on my phone just aimlessly scrolling and it wasn't good
5/ have stuff to look forward to. It's hard but i found booking in small things - eg pub garden drinks in April with friends, a visit to my sister in London in June - helps keep me going and feeling like time has a shape still.
I hope any of this helps. It is so damn hard, and i didn't even have homeschooling to contend with. So treat yourself gently and give yourself and your mental health some priority xx