Performance tests to a web page

I have this project in where I want to do load tests on a web page.

I initially learned Selenium but then realized it is more for how a web page works. I also tried Jmeter, but I want to do load tests including the user's behavior, such as clicking, uploading files, retrieving files, and so on.

I tried as well with the plugin for Selenium in Jmeter but it seems to open a navigator for each thread. My test will consist of a maximum of 14000 threads, so I wanted to know if you know some tools or what do you recommend in these cases. Thank you