Personalizing my profile with n o knowledge on CSS

so uhhh i've been sitting making my profile for a little while and it's not as hard as one might think, it's pretty easy if you can use logic well, i use different forums and all that but one video that i found very helpful helps you with the basics of how to change your background, add a banner, and even change the font (https://youtu.be/iIcDGa6y3zU) she's very chill

i made my banner as a gif using canva.com, you just create your image and import it as either a gif or a static (no movement) normal jpg file to add it into your profile, to actually put it into the code you just upload your image on https://imgbb.com/ then after it is uploaded you right-click and copy image adress to finally add into the code

this seems simple enough for me, but i explain things poorly so sorry if it's hard to understan lolol, css is like a puzzle so good luck <33