Visit site give a white page

I had to move my blog due to different hosting package. After this move, my blog would be in a different subdomain.

Before my blog was under:
https://www.marakoudja.com/blog and https://www.marakoudja.com/blog/wordpress

I have done the following:

1. Install wordpress under https://www.en.marakoudja.com/blog but it was installed under https://www.en.marakoudja.com/blog/wordpress
2. my hoster restored my DB under https://www.en.marajoudja.com/blog or /blog/wordpress .. I am not sure

I could manage to get to the admin panel by entering
https://en.marakoudja.com/blog/wordpress/wp-admin
in my explorer

and changed the urls for

https://en.marakoudja.com/blog/wordpress
https://en.marakoudja.com/blog

I moved the index.php under /blog and edited the index.php to show
./wordpress/wp-blog-header.php’)

Now, when I am in my site admin, I can see all my posts, the comments and the users, everything is there but when I click on “visit site”
nothing happen .. I get a blank page.

Somebody can help?