I can't change the URL of my website with .htaccess, because the query does not work anymore if I make it a pretty URL, so I am desparate to know what impact this will have on SEO. I mean, I have to use this one, because my community wants to see this page as the homepage, which I can understand, but I don't know what effect this will have on my pageranking.

The funny part is that this page has no canonical URL and it has noindex on it, so that is not good at all, but I am asking you for the URL in the address bar specifically. Can someone explain to me what will happen?