I just made finished my first KiCAD layout, and I like to help to improve this software. Because I’m not a programmer I might help with the component library. I made about 40 PCBs in my professional life, with several different PCB software packages - Eagle, Mentor and Geddy (sic!)
On the page https://kicad.org/libraries/contribute/
“Currently KiCad librarians team counts with just a few people against a lot of merge requests and work to do, having your help would be very appreciated.”
So it seems that this is the way to go. However, I did not find any method to contact the library team. I might spend something like 3 to 5 hours per week for this.