Can't get Frontend Search to work Well, to be honest i am completely new, not only to Craft but to most PHP stuff as well.
I am currently trying to setup a search for my page but i seem to miss a crucial step and can not find any tutorials on what to do.

On my front/ index page i included

&lt;form action="{{ url('search/results') }}"&gt;
&lt;input type="search" name="q" placeholder="Search"&gt;
&lt;input type="submit" value="Go"&gt;
&lt;/form&gt;


as stated in the Craft Documentation.

I have also set up a single page for my search results with the code from the Documentation as well:

&lt;h1&gt;Search Results&lt;/h1&gt;
{% set query = craft.request.getParam('q') %}
{% set entries = craft.entries.search(query).order('score') %}
{% if entries|length %}
&lt;p&gt;{{ entries|length }} results:&lt;/p&gt;
&lt;ul&gt;
    {% for entry in entries %}
        &lt;li&gt;&lt;a href="{{ entry.url }}"&gt;{{ entry.title }}&lt;/a&gt;&lt;/li&gt;
    {% endfor %}
&lt;/ul&gt;
{% else %}
&lt;p&gt;Your search for “{{ query }}” didn’t return any results.&lt;/p&gt;
{% endif %}


So, now if i try to search at the index page and hit enter, it just reloads the index page with the search term

site.url/index.php?q=test


So for sure i am missing a step here and am not loading the right page. I guess it should be stated in {{ url('search/results') }}, but i have no idea what to put there.

Would be great if anybody could help me or at least point me to a tutorial that focuses on setting up a site search in Craft CMS.
Inside of the &lt;form action="{{ url('search/results') }}"&gt; You define which page should be redirected to when the search form is submitted.

"search/results" would go to the search folder looking for the results.(html / twig). 

If you want to redirect to another page you should name the folder (which is "search" now) then the template name. This can be static without creating a "Single" for that page. 

If you did create a single that uses that template and you want to go through your single you can just put the slug of the created Single inside your form action.

Example:

You made a folder in craft/templates/ named: search, inside that folder you make a file named: results.

So the file structure would be craft/templates/search/results.twig and the form action would be: &lt;form action="{{ url('search/results') }}"&gt;

This way you can just use the preset search template the craft docs offer you. You could also change "results.twig/html" to index.html and then your form action wouldn't need the /results so your action would look like:
&lt;form action="{{ url('search') }}"&gt;

But I see you get redirect to /index.php/ aswell so I should try rmeoving that by changing your .htaccess file and maybe your general.php.

You can find instructions on how to do that here:
https://craftcms.com/support/remove-index.php