For anyone struggling with this I have two things that might help

In the moment, you need to get out of bed. Doesn’t matter with you do. You’ll feel tired again after a while and then you can go back to bed. You don’t want your brain associating your bed with being awake

More systemically though. You might not be getting enough exercise. Especially if you work at a desk, or are a student. I like going on long walks, but just find something that works for you. The key here is to experiment