Thank you! ♥ Well, the crucial part is to make sure both the profile picture and header are in HD/HQ when you download it, you can type it on Google with HD/HQ as part of the keyword, or look on some sites such as Pinterest. Then when it comes to editing, for pfp make it 400x400 pixels while the header is in 1500x500 pixels for the size, both with .png as the image type.

In my case, I use Photoshop as the editing tool. I always use the Smart Sharpen tool after adjusting the brightness, exposure, and color balance so the edges look more alive too.