Blogging before being certified

I asked a similar version of this question on the business questions but haven’t heard back.

I am in 4th month of Scholars and am going to become a certified coach however it may not be until 2019. I created a blog page called, my life after merlot, however, it is not live yet.

My question is do I begin writing blog posts to find my voice before I’m a coach. I want to share my experiences yet also want to be a credible source for people.

I feel like I’ve got one foot in and one out.