Read more link problem

Hi guys,

I’m creating a website for a friend and we’re almost there, there’s just one big problems i need to solve.

Here’s the website:
https://www.melaniemendelewitsch.com/

I’m using the Oneengine theme, and i’ve deleted some stuff to make it more simple.

Now what i did is transform the “categories” into some kind of pages where all the posts that belongs to this category appears, like so:

Now my problem is that if you click on “Read More” at the bottom of a post, it takes you back to the homepage.

NOT GOOD ! NOT GOOD AT ALL!

what i’d like is for the read more link to take me to either a page with the entire post or to another website.
And of course the read more of each post should take me somewhere else.

Any idea ?
Please i really need your help on this.
Thanks !!