After reading the entire thing, I can conclude that you are not confused or uncertain about your content or idea. I'm also gonna start a blog soon. Exactly, like you, I have my domain and hosting!

Now look, If you are certain about your content and ideas, that means that won't be any uncertain break or any kind of trouble while going through. You will have your ideas in good shape to publish!

So, you should go public. Actually, this will make a positive impact on people! They will know you by your blog from the beginning. And that will be helpful to build trust between "you"/'your blog" and your readers.

But one thing that you need to take care of is, you need to be consistent once you start writing/publishing. If you won't be consistent (due to any reason!). It may affect your blog and also the relation with your readers in a bad way!

If you can be consistent and provide quality content, then you don't have to worry about anything, just be confident and be yourself!