Now it's difficult to explain this in text as if I type how to add a link, it will just turn it into a link!
So, I have a picture showing how you do this.
Where it says "yourlink", add the URL of your blog or the blog post you want to link to. Remember to put the speech marks around it.
Where it says 'here's mine', put the text you want it to say - this is the text of your link. The rest of this text remains the same every time.