To get started with Odoo OWL development, a strong foundation in JavaScript (ES6+) is essential, as OWL is a reactive framework inspired by Vue.js and React. While knowledge of Vue or React isn't required, understanding their component-based structure helps in mastering OWL concepts like state management, lifecycle hooks, and template rendering. jQuery is mostly obsolete in modern Odoo development, and TypeScript is optional but beneficial for structuring large applications. Additionally, familiarity with Odoo’s backend (RPC, models) and XML for templating will be crucial for seamless integration

And this video might be interesting: https://www.youtube.com/watch?v=7PWfjZKjlL8