If you wan’t to do a simple loadtesting of your site, then i will recommend using Apache Bench, it’ simple to install
Installing Apache Bench
sudo apt install apache2-utils
Suppose you wan’t to test if your site can handle 100 request with 10 concurrent users.
ab -n 100 -c 10 https://www.pvangsgaard.com/
I got this result…took only 6 sec to handle 100 requests