Not able to publish Website properly through AWS S3 Bucket

I'm trying to publish my static HTML, CSS, and JS website through AWS S3 bucket. However, I'm running into several issues. After purchasing my domain, I created an S3 bucket called 'drainleaf' and then following the AWS Youtube tutorial, I tried to publish my site. However, I'm getting some errors. I basically uploaded my site folder in the 'Overview' tab of S3. Then, inside the properties tab, I added my index.html file. Lastly, i added bucket policy in Permissions Tab. I'm getting a 404 not found error when i visit the domain. Below are the links to the screenshots for context:

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