I am using wordpress to create a website, inadvertently found in Facebook GSAP this amazing tool, because I use wordpress to create a website, only understand the basic HTML, CSS, for JavaScript is not too well understood (but currently also in learning), I do not know the community of friends, can you hint, I need to learn what to learn GSAP, (for example, HTML, CSS, JavaScript these are required: beginner, proficient, professional to be).