Many will say that it is impossible to learn GSAP without knowing a minimum of JS,
but believe me I started my life as a developer (2016) by first tinkering with GSAP without knowing anything about HTML / CSS let alone JS.
I've always been a designer and wanted to know how to make my sites, so I started using Adobe Muse (discontinued)
that generates the site only using the visual mode, then I felt the need to use animated elements, I left for Adobe Edge Animate (discontinued too),
but I still felt much lower than the animations of reference sites in Awwwards until I started to study how they did that animation and
it was there that I came to the beloved GSAP, and believe me, I started to use GSAP without knowing anything about code,
a video that helped me a lot it was the videos created by Petr Tichy (Link of videos),
and also the moderators here of the forum because I asked a lot of questions since I did not understand anything of what I was doing hahahaha.
Summary can be used however as Jack @GreenSock said, it is much harder, much better and more yummy when you know what you are doing.
Good luck and remember: Learning is never too much.
Ps .: Today I do everything in the manual hahahaha