down a .cur of your choice from any website that has them then convert it to a png using any .cur to .png tools online then upload that png anywhere you want to host it (i host mine inside of a glitch page on glitch.com) then take the url of that and replace "url here" in the code below with it and thats it! you now have a custom cursor on your profile without the base64 stuff and other longer methods
<style>
body {
cursor: url('url here'),auto;
} </style>