Hi, I like to find some Desktop background and Profile picture(avatar). I like to change but i haven't any. I know about the site devianART.com, Its brilliant. But finding what you want is difficult sometimes. For example i love SPACE pics but i can't find good pics. I just want to get some help for finding this things easier in the Internet. You can just give me some beautiful pics or show me some methods to find this things. Thanks.
What OS do you have? Just google "Windows 10 wallpaper" or "OS X wallpaper". You should get many many results. As for an avatar, just search for "space" or whatever and in the search tools, search by size to get what you need.