I don't know what I'm doing....HELP!

I am a beginner, I have been testing out how to use this but I don't know how to add a picture to my header and/or put text in it and logo, unless all that can't be done.

Also, I don't know how to add "TC" as a link in the footer or put it as a page. I also don't know how to add pictures to the service area.

Yeah, like I said, I need help. If there's a video to watch let me know. Ok, thanks!