Will changing default page mess up anything?

I am converting a web site over to wordpress. I don’t want the default front page of the site to be the wordpress page because I want it to change only when I change it, not every time I add something (and I don’t want the site to look like a blog).

What I want to do is change my current index page from index.php to home.php and then change the .htaccess to make the server display home.php before any other file names.

Ex/
DirectoryIndex home.php index.php index.html index.xml index.htm index.cgi

That way when someone types in my site’s domain, they are redirected to https://www.example.com/home.php for the home page.

Is that going to mess up my permalinks? Currently I’m planning to use /%category%/%postname%/ so that permalinks are created as https://www.example.com/category/name-of-post/