Is necessary to learn options API to understand how Vue works ? or can I just skip it and go directly to composition API in Vue 3 ?
It would be better to always have knowledge of options API as Vue2 totally depends on it, And also most Vue project ( Vue 2 or Vue 3 ) is written with options API.
Also, I think if you have a good knowledge of it, I know it has totally different syntax but they have some common concepts.