I have no idea whether this would be of any help to you, but I've found that when I have a hard time getting to sleep, very warm baths are really helpful. More so than really hot showers which I've also heard recommended. I dunno, I used to have problems sleeping a lot, and lately I've found if I'm on edge or anything like that a super toasty bath is really soothing and helps me get to sleep.
In any case... good luck!

Oh man... I would take a bath EVERY DAY if I could ;______; but somehow, even between my family's two houses, there's only ONE bathtub XD And it's upstairs in my sister's room that she shares with her friend >_> sooo ... it'd be awkward at best to use it XD

Plus, literally NO ONE has used it in like the 15+ years it's been there, so I'd get questioned why I'm suddenly deciding to take baths X'D (Not that I should HAVE to explain myself, but yeah) I only use it maybe once a year when my sister and her friend are on vacation, and even then, my mom hears the water running and is all "WHY U TAKING BATH" >______> sometimes I wonder why my mother even put that bathtub in the bathroom when she remodeled it. XD

But YES I am usually really relaxed by hot water <3 I'll try the hot showers!

Ah, I feel pretty lucky because my parents' bathroom actually has one of those oversized tubs (not a Jacuzzi one, just the slightly bigger kind) or my bathroom has a little average sized one. I never used to take baths, I mean other than when I was a little kid, but lately man I have just found that they are a great way to relax. But yeah, I can see how it would be a little awkward if you had to use one that was in what you consider somebody else's space.

If a shower is what you have to work with though, I mean you could even see if throwing in a shower bomb in a soothing scent was helpful. Sometimes it's little things like that that end up helping out more than one might actually expect! Good luck! : )