How to speed up my website

We have an online paper help website - https://www.edumagnate.com/ which I tested on Webpagetest.org and it generated this result https://www.webpagetest.org/result/200426_VN_07feb2d14d9558a8d6c964bc8874db61/, can someone help to understand this chart and my total loading time is showing 3.163s, what I need to do to reduce to 2 seconds?