Blog posts not showing in new theme

I’ve been researching this topic and I’ve found different answers everywhere, but they’re really old… I’m sorry if this is redundant or not in the right forum section… this is my problem:
I’m using a new theme I found and it’s has a blog template, but nothing shows on that page when I go to it. I’ve set my reading options to have a static page with the blog posts pointing to my blog page, 3 posts per page, but that’s not working either. I’m not really sure what else to do with this. Is it the theme itself? The theme I’m using is Angelina, from here, Demo

Mana Ink is my homepage and my site is a conglomeration of a blog, webshop, commissions, and webcomic. So far I’ve figured everything else out, except this. The shop aspect is still under construction.

Does anyone have any idea of what is wrong with my site? =( That’s the one thing that’s bothering me right now… posts not showing where I want them.