Hey man, folks go where there's value. If you've got something valuable for readers and can regularly keep it updated with valuable content then you can definitely create a popular site.
Wolffire games has a popular site because they post tutorials, articles and videos on their dev process. Myself and many other devs found them because of those tutorials. http://www.wolfire.com/
Pear & Melons is creating a following online because of their youtube videos - which they spend just as much time trying to make entertaining as they do their games. http://pearandmelons.com/
Pixel Prospector is gaining heaps of popularity because of his hugely beneficial resource compilations. I link to his Big List of Game Making Tools all the time!http://www.pixelprospector.com/
Obviously you've got a game to make.
At the same time you know a popular blog will help your game be a success - which will help you make your future games!
So, how do you do both at the same time without one negatively impacting the other?
Anytime you figure out how to do something: write a post about it.
If you had a particularly hilarious bug: post a picture of it.
If you gave an interview to a highschool newsletter reporter: post a link to it.
At the end of every week look at what you've done so far and ask "will someone else find value in this?". If the answer is yes, post about it!
Push your posts out to Reddit, Facebook groups, Linkedin groups. Whichever group will find that particular post the most valuable.
It's important to keep in mind that folks will click on that link if it answers a question, addresses a concern or mentions something they're particularly interested in right at that moment. If it doesn't do one of these things, it will unlikely be clicked on (by anyone other than your friends and family anyway).
Hope that helps!