google speed test

Here is some screenshot of my page analytics using page speed insight I want to increase THE FCP&FID to green, i don't know what steps should I make to do so And for this google say it's important to be the text first thing that visitor see while loading your page. Any tips, I'll appreciate

One of my website's desktop speed in Google speed test is above 90 but mobile speed is around 64. It was 47 initially but I complied Google recommendations and it is now at 64. As you know Site speed is now an important factor in SEO and majority of user also visit through their mobile. I want...