As said, you should have some basics in place.
But you won’t ever really be ready because frameworks have their own rules and ways of doing things. So a good foundation is good to have but it won’t prepare you for the framework’s way of doing things, like its reactivity system, the templating, or any DSL used (domain-specific language).
Then it should be fine to start learning a framework.
I’ve edited your code for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.
You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.
See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (').