WELCOME BANNER
INSERT YOUR OWN WELCOME MESSAGE
Open the header.php file located in the theme folder, and go down to here you see the default welcome message (should be line 52), and edit the text to display your personalized greeting instead.
INSERT YOUR OWN PROFILE PICTURE
Go to the /images folder, and replace the profile.jpg with your own image, which must be 250 x 141 pixels in size, and must also be named profile.jpg. If you do not want an image next to your welcome message, then you can delete the profile.jpg file from the images folder and the space will become empty, which also looks fine.