Good plugin to start with

I tried it, used it for a few weeks, then bought full version as it did exactly what I needed. I still use the plugin together with WordFence, but it seems the premium version of this plugin will soon have all the features I need.
I didn’t notice any slowdowns of the website (tested with Query Monitor and LAPS plugins). One thing to point out – if you use a theme that uses custom CSS classes that identify the theme (like Divi, Flatsome, Avada), you won’t be able to fully hide the identity of the website. But changing paths to includes, uploads, plugins makes it much safer against dumb crawlers.