Rewrite partial URL to specific page with .htaccess mod_rewrite - apache

Question

Couldn't really figure out a title for this, so it's not the best, sorry.
I'm looking to rewrite URLs like this:
https://awesomechristianmusic.com/song-list?artist=dc-talk
To look like this:
https://awesomechristianmusic.com/dc-talk
Or for genres/topics:
https://awesomechristianmusic.com/song-list?genre=rock
https://awesomechristianmusic.com/song-list?topic=forgiveness
To look like this:
https://awesomechristianmusic.com/genre/rock
https://awesomechristianmusic.com/topic/forgiveness
Unfortunately, there seem to be some issues with my .htaccess file and I can't figure it out. Here's what I'm working with:
RewriteEngine on
RewriteBase /
# Force HTTPS
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,QSA,R=301]
# Remove www.
RewriteCond %{HTTP_HOST} ^www\.(.*)$
RewriteRule ^(.*)$ https://%1/$1 [R=301,L,QSA]
# Remove trailing slashes
RewriteCond %{REQUEST_URI} ^.*/$
RewriteRule ^(.*)/$ https://%{HTTP_HOST}/$1 [R=301,L,QSA]
# This is where I'm currently working
RewriteRule ^/([^/]+)$ /song-list?artist=$1 [NC,L,QSA]
RewriteRule ^/genre/([^/]+)$ /song-list?genre=$1 [NC,L,QSA]
RewriteRule ^/topic/([^/]+)$ /song-list?topic=$1 [NC,L,QSA]
# Redirect everything through index.php
RewriteCond %{REQUEST_URI} !(/(api|edit)/?.*) [NC]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* index.php [NC,L,QSA]
# long list of 301 redirects
Currently, the three rewrites I'm working on don't do anything. If I remove the slashes at the beginning of their regexes, I get a 500 Internal Server Error. Any ideas what might be going wrong or how to fix it?

Answer 1

Swap out these three rules:
# This is where I'm currently working
RewriteRule ^/([^/]+)$ /song-list?artist=$1 [NC,L,QSA]
RewriteRule ^/genre/([^/]+)$ /song-list?genre=$1 [NC,L,QSA]
RewriteRule ^/topic/([^/]+)$ /song-list?topic=$1 [NC,L,QSA]
To these three rules:
# If not /genre/* and not /topic/*
# Convert /dc-talk to /song-list?artist=dc-talk
RewriteCond %{REQUEST_URI} !^/genre/(.*)$ [NC]
RewriteCond %{REQUEST_URI} !^/topic/(.*)$ [NC]
RewriteRule ^(.*)$ song-list?artist=$1 [NC,L,QSA]
# Convert /genre/rock to /song-list?genre=rock
RewriteRule ^genre/(.*)$ song-list?genre=$1 [NC,L,QSA]
# Convert /topic/forgivenessto /song-list?topic=forgiveness
RewriteRule ^topic/(.*)$ song-list?topic=$1 [NC,L,QSA]
You can view these rules in action here: https://htaccess.madewithlove.be/?share=763f7107-f056-5ebe-ae0a-7f53a17b225a