So what I have currently is fabric-loader for 1.15.2 so I can use Xaeros Minimap. I don't if it is that I should download a optifine for fabric loader but it seems in the past when I tried to, nothing really seemed to change or opening the game to the Start up screen would crash. I'm not sure what I'm doing wrong here. I did try downloading Optifine for 1.15.2 and then downloading a Shaders for it and putting that in the Shaders folder. But as I mentioned when I'd start up the game and get to the main menu the option to switch to Shaders wasn't there.