This process could be a lot simpler, but I wanted to link to you official sources so you would know it's not some virus crap.
Download OptiFine 1.14.4 HD U F3 from https://optifine.net/downloads Download Faithful texture pack from https://faithful.team/files/releases/1.14.4-r4.1.zip Download Sildur's Vibrant shaders v1.23 Extreme-Volumetric lighting from https://sildurs-shaders.github.io/downloads/
Press the Windows key and R together to open the run dialog Type in %appdata%.minecraft Put the OptiFine .jar file into this folder Run this OptiFine jar file. Just press install, no need to change the folder. Go to the resourcepacks folder Extract the 1.14.4-r4.1.zip file into a new folder here (name doesnt matter) Check that inside this new folder is a pack.png, and that its not a folder in a folder. Go back up to the .minecraft folder Create a "shaderpacks" folder Extract the Sildurs Vibrant Shaders v1.23 Extreme-VL.zip file into a new folder here (name doesnt matter) Check that inside this new folder is another folder called shaders Once thats done, open the minecraft launcher. you should notice in the lower left the profile is now called OptiFine Start minecraft Go to Options -> Video Settings -> Shaders Click on Sildurs Vibrant Shaders Click Done Click Done Click on Resource Packs Mouse over the 1.14.4-r4.1 line and click the Play button in the icon Click Done, Done, and you're done :)