Is jquery something people start projects with today? If so, what is the motivation?
That said, back in the day it provided functionality that JS just didn't, or was quite cumbersome.
With recent JS versions, JS can do a lot of what JQ did for it, but JQ's API or "surface area" is still syntactically smaller and (IMO) more sane than those JS improvements.
Besides it having a way more convenient API than bare JS. (That honestly, I only don't use because bare JS is conveniently documented by MDN, otherwise I think I'd be fully on it too.)
[1] - https://colorlib.com/wp/wordpress-statistics/
[2] - https://w3techs.com/technologies/overview/javascript_library
If you are brand new to the space and looking to learn, then yeah stay away from jquery.