I somewhat identify with this. I have dozens of things I want to do and if I get started on something, I can happily work on it until 2-3 in the morning, even though I usually go to bed at 11. It’s the getting started on something that takes so much effort.
I have the same problem. For me what helps is having a schedule, you do your thing at a certain time automatically every day, which seems to lower the activation energy. For one-off tasks it helps to set myself a reminder that I intend to do whatever it is at a certain time.
But I still struggle with this for sure. I could always use more advice myself.