It is not clear why you need to provide such link.
DevTools is not a tool for the end user.
If you don't like keyboard shortcuts, then there is a page chrome://inspect/ which has the list of pages and extensions, and each entry has a link that opens devtools.
Also, you may use remote debugging page which opens devtools in a page.
https://developers.google.com/chrome-developer-tools/docs/remote-debugging