Where should I focus my energy?

Hi all. I'm not sure this is the best group for this question. I'm a freelancer within digital marketing and have done a little marketing on the side apart from my daily job. I have been posting on my biz IG account, Facebook page, LinkedIn and a few blog posts. I just started a Facebook group about FB ads for beginners (for building an audience for my course in the autumn).

I'm considering changing my signature font, why I have a hard time starting with a new theme on my IG account and I have a hard time where I should put my energy.

Should my main focus be creating blog posts, SoMe posts or something else for building my audience and potential customers? What are your experiences?