Hi there,
Can you give a bit more info what you mean by “up to date”? If you’re speaking of the description page at https://www.ads-software.com/themes/intergalactic/, that’s referring to the original Intergalactic theme, not Intergalactic-2. We provide support for both versions in this forum, but Intergalactic-2 can only be installed via the Jetpack plugin, or downloaded from the WordPress.com theme page at https://wordpress.com/theme/intergalactic-2
That said, in this forum we can only help you with issues related to Intergalactic 2 itself. We’re not able to advise you on other, similar themes – there’s literally thousands of WordPress themes out there, and we only make a small handful of those, so your best option is to use filters available at https://www.ads-software.com/themes/ to search for themes with a similar layout and features.
has a way to have a blog page also and not just on the main page.
That has nothing to do with the theme. The ability to set a different page from the front page as your blog page is a core feature of the WordPress software.
Create and publish a new, blank page on your site for use as the blog page, and create a page you wish to use as the front page instead.
Then go to Appearance ->Customize ->Homepage Settings. Select the option to show a static homepage, and then use the drop down menus to assign the front page and posts page respectively.
Intergalactic 2 does nothing to override this default functionality of WordPress.