Getting to admin section to personalize page

I would like to know what bookmark I can use on my browser to go directly to the admin page of my site. I think I just downloaded the theme Dixie, but now I am lost again.
I will probably have more questions, but at least I am making some progress now. Hope to get over the nervousness soon!
I am also not sure how to share my location. That will probably come in handy as I ask for more advice.
Thank you for your help!