Your ability to go to sleep depends on everything you did earlier in the day. If you do more work, more physical activity, and more things you have been putting off, you will have an easier time sleeping. Avoiding caffeine may also help, as does waking up at a consistent time. I found it helps to play a podcast I don’t care about at a lowish volume as it gives me something to do on my phone that’s compatible with falling asleep. You also need to go to bed early enough, but if you structure your day to tire yourself out, it is a lot more straightforward to do this.