add template to a page

I just started with a wp installation. (few days ago) my knowledge about php, mysql and html is more advanced, but my wp skills are not good, that’s why I can use some help.

I have installed a free wp theme under WAMP called Best Hotel .
together with it an install of Elementor and templates.
I try to figure out how things work, its al related.

It is not clear in which section the specific modifications should be done: Elementor, WordPress, Best Hotel , Template or anything else
I created a template in the template section. Saved it, made a category.

But if I go to all page (edit quick) then attribute my own created template then I dont see my own template showing up, only the options : standard template, elementor canvas and elementor width
I would expected to have a possibility where to do that.

Has anyone any idea?