How to setAttributes in Gutenberg block?

Question

I try to make a Gutenberg plugin but I have problem to set a value of attributes. I npm this template npx @wordpress/create-block example-plugin --template @ryanwelcher/multiple-blocks-template because I want create a multiblock plugin. the problem is where and how register attributes.

I register it on block.json:

 "attributes": {
        "content": {
            "type": "string",
            "selector": "h2"
        }
    },

Then I used it on edit.js

 export default function Edit({attributes: {content}, setAttribute}) {
      const blockProps = useBlockProps();

     return (
      
         <p {...useBlockProps()}>
             <input value={content} />
               <TextControl label="Question:" value={content}
                allowedFormats={["core/italic"]}
                onChange={x => setAttributes({content: x})} >
             {__('larum ipsume', 'page-builder')}
         </p>
     );
 }

this method work but I have an error. I cannot write all sentence but just first letter and it refresh my input.