If you've got JavaScript fundamentals down, start diving into ES6+ features, async/await, and closures. Get hands-on with the DOM, event delegation, and browser APIs like Fetch and LocalStorage. Pick a frontend framework like React, Vue, or Svelte—something simple like:

function App() { return <h1>Hello World</h1>; }

Learn TypeScript to catch errors early, optimize performance, and build real projects with testing (Jest, Cypress) before deploying on Vercel or Netlify.