Note: You can click any image for a larger, more readable, version. :)
So adding links to text is pretty easy- and I'm going to walk you through it step by step. ;)
1) When you have an Etsy shop that you'd like to link to like mine, ZenithJade Creations, highlight the text that you'd like clickable.
2) After highlighting, click blogger's handy link icon from the above editing bar.
3) By clicking, it will bring up a pop-up window. Enter the url, or address, of the site you want your link to go to. Then press "OK" in the pop-up window.
Voila! You've made a working link! :)