there are a couple of images you could make smaller, especially the social icons. They’re 125px but are displayed at 50px. Logos can be smaller as well.
Also, clear up the css styles
. Both of those will shave off a bit of loading time. Have you tried testing your website with https://webpagetest.org/ or tools.pingdom.com? I haven’t seen that website you used before. Some sites have different outcomes.