Fibers is probably used more in the Guile community these days
More like goroutines. They remind me of Guile's fibers: https://github.com/wingo/fibers
Do you mean like fibers ( https://github.com/wingo/fibers ), or something beyond that?
I recommend you try/use GNU Guile. It's a Scheme which has better grounds that other lisp language. Among Scheme language, it stands out with good support for foreign function interface (ffi), support for OOP, a good support of standards (r6rs and various srfi and r7rs support is in the work). There's a real community. Recently support for asynchronous code was added through fibers project [0] which makes the use of non-blocking socket (almost?) transparent otherwise said you can use the same procedures in asynchronous or non asynchronous code. There is opengl bindings and a 2D framework called sly with which you can do live coding. There is simple but efficient libraries for doing web apps. A more advanced option is to use Artanis [1]. And some people are working on better array operations to match numpy for doing matrix operations.
This is not Python tho. There is not as much people or library. Package sharing is different, it's mostly done through guix/sd or copy/pasting (!) modules in your projects (at least that's what I do and it works). Otherwise said, there isn't a solid equivalent to pypi outside guix...
BTW, guix is a an functional package manager where guixsd is distribution built on top of it [2].
Also, it's a GNU project which means your contribution won't be lost in the sea; join a community dedicated to building ((good) free) softwares that can make a difference and where you can make the difference.
HTH!
[0] https://github.com/wingo/fibers [1] https://github.com/nalaginrut/artanis [2] https://www.gnu.org/software/guix/