While I am not an animator, I have worked with animators in my job as an Instructional Designer. Plus I am a bit of a Disney nerd. Animation is complex and I have know animators who animate different elements of a scene, from background, to lighting, to creation of characters in a full range of motion. I think that the hardest part of the work is learning your digital tools, such as Adobe Character Animator.
I think that first you should consider how you want to use any animation skill that you have. Are you looking to create videos or video games? Are you interested in focusing on individual characters or entire landscapes? The skills and training would need to be different. I saw in another post you asked about working on an animation team, so it sounds like you are willing to be specialized, like focusing on the building of a character while someone builds the surrounding environment. That kind of work sharing can be powerful, especially with finishing the work faster. It also requires specialization in a particular area while understanding the whole animation process.