These websites can generate sounds such as wind, rain, wolves howling, sled dogs and more. And it's free. There are streams of nature and sounds of streams as well.
There's always the choice to make a donation for even more features.
https://mynoise.net/noiseMachines.php
and
https://calmyleon.com
There's 100's or maybe 1000's of possible configurations of them.
I am a poor sleeper. I might try these. Thank you
If you are on macOS or Win you could also give "sleeping dragon" a try (I use it during work hours), which as also been added into myNoise as a generator:
http://tiny.cc/sleepingdragon
The main difference is, as fas as I can tell, that the one on MyNoise is a Generator within MyNoise (which would be available, e.g., within the iOS as as in-app purchase) whilst the sleeping dragon I linked above is a standalone app which runs a "drone generator" on your local hardware, even whilst offline. My understanding is that the developer of sleeping dragon shared some of his code or his "generator" with mynoise (possibly primarily to make it available on iOS)
~
"It's OK, honey, you rest -- I've got this!":
IF ALL ELSE FAILS: Daddy's Little Helping Hands for catalyzing
just the right nocturnal meditative state: