Import from old Joomla 3 to new site with Joomla 4 - how?

Hi!

I want to rebuild my J3 website, and make a new one with J4. I will not just upgrade the existing site. I will create a complete new J4 installation, and rebuild the pages.

But therefore, I want to keep my discussions of EasyDiscuss and blog articles of EasyBlog.

So I was wondering - what is the best way to do that?

Do I have to import all users from the J3 database to the new J4 database first?

Or will that happen automatically, when I import the dicussions and blog articles?

What about images, which are in EasyDiscuss and EasyBlog? Are the exported from old and imported in new installation automatically?

Thanks