Migrate to Knownhost or Stay in AWS Lightsail

I have a woocommerce site that i keeps tinker to increase the pagespeed score and website load speed. I actually tried using the Knownhost shared hosting account. Im just working if i should get the managed wordpress hosting package or stay with aws lightsail, install ubuntu instance, add lightsail server and redis to it. Im not a hosting guy, i rather develop a website than take care of a server. Right now we are below 50 in mobile and 60 in desktop pagespeed score.