Thank you for posting this question.
With a blog, just like everything, content and engagement is the most important. You need to release fresh, connecting content that aligns directly with what your readers want. This will take research (I can help you there as well), as well as dedication, but you can certainly set yourself apart even with just an avatar.
The other piece beyond content is engagement. Reach out to your members, ask if you can send them emails, setup newsletters, ask the members what they want to talk about, and drive the conversation.
I would love to get into the specifics and discuss with you the best approach. Let's set up a call and go from there!