There are a few problems with your HTML code. The first, related to your SCRIPT tags, is that they're not supposed to be nested. SCRIPT tags always go on a line by themselves sequentially, and are never nested. The outlined SCRIPT tags in the screenshot below should be deleted.
Second, your existing "valid" SCRIPT tag isn't properly done. The format of a SCRIPT tag should basically look like this:
Additionally, most of the CSS link tags are also improperly done. The format for a CSS link tag is as follows:
<link rel="stylesheet" type="text/css" href="[path_to_file]">
<link> tag is not a script and never goes inside a
<script> tag. Like the script tag, link tags always go on a line by themselves sequentially and are never nested. Also, they never have more than one href attribute—there's always only one href per link tag. If you have another link, then you need to write another separate link tag. You can't "combine" two hrefs into one link tag, it doesn't work that way.
Finally, it's usually better practice to put your SCRIPT tags at the end of the BODY, and not in the HEAD. That way your page will load before any scripts run.