this actually, is super easy!! it only requires base-copy and paste knowledge and a line of css code!!
first ; paste in the code "<img src="imagelink.here">.  << this is essentially your images source!! (hence "img src")
this can be put anywhere in your profile as long as it supports html or css! say, about me, heroes, ec cetra

to get a link for your image, i reccommend using rentry or pinterest (resources from these 2 will be in future replies <<)

for custom links, i recommend using an image hosting site like imgur!!! after you have your link, just post it in the "imagelink.here" space :]

-blahhaj

Resources -

credit goes to all the rentry/pin owners!! to use images, just copy the image link and post it using the guide above ^^

https://rentry.co/ttoyaa   < various headers, pngs, ect
https://rentry.co/decor  < some stamps, pngs, dividers!! also includes pixels x3
https://rentry.co/lesbiian < stamps, dividers, pride stuffs, pixels and fonts!
https://rentry.co/Pancreas < dividers, symbols, ec cetra
https://rentry.co/border < very useful for dividers and borders
https://pixels.crd.co/  < includes emotes, pixels, and has a sister website for dividers
https://dividers.crd.co/ < sister website to pixels, includes a range of colors!!
https://rentry.co/purio  < resources and templates, templates (rentry) can be modified into css >

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

2. Custom Mouse!

this is also really easy and included in the website linked!!
https://www.cursors-4u.com/ <<<

in the mouse you pick, scroll down and there should be 2 blocks of code!! copy and paste the second one in the start of ur about me, this is the css version :3

for instance,

"/* Start https://www.cursors-4u.com */ * {cursor: url(https://cur.cursors-4u.net/anime/ani-12/ani1136.ani), url(https://cur.cursors-4u.net/anime/ani-12/ani1136.gif), auto !important;} /* End https://www.cursors-4u.com */"

this is a really cute miku  mouse!! pasting this at the start of your about me gives u this adorable mouse