I will try to keep your tips in mind.

another tip: try to use your bed only for sleep, not for scrolling through the Fediverse or just chilling.

The more you do apart from sleeping in your bed, the more your brain connects its synapses with the fact that the bed is not meant for sleeping.

So the other way around, if the only thing you do in bed is sleep, your brain connects bed = sleep and you'll fall asleep way easier.