Nginx reverse proxy ssl: This page isn't redirecting properly

Okay, to start off with I'm new to all of this and still learning. I've got Nginx set up, and my standard reverse proxies work both inside of and outside my network. I've set up certbot and generated a wildcard SSL cert, I'm trying to get my proxies set up to use it. Now, they work ON my network, but outside of my network we get "Cannot open the page because too many redirects occured". Can anyone more knowledgeable take a look and hopefully fix whatever I broke?

Below is the configuration I'm attempting to use:

server {
   listen 80;
   server_name subdomain.mysite.org;
   return 301 https://subdomain.mysite.org$request_uri;
 }

server {
   listen 443 ssl;
   server_name subdomain.mysite.org;
   ssl_certificate  /etc/letsencrypt/live/mysite.org/fullchain.pem;
   ssl_certificate_key  /etc/letsencrypt/live/mysite.org/privkey.pem;
   ssl_prefer_server_ciphers on;

   location / {
        proxy_pass http://internalIP:port;

        proxy_set_header        Host $host;
        proxy_set_header        X-Real-IP $remote_addr;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header        X-Forwarded-Proto $scheme;
        proxy_headers_hash_max_size 512;
        proxy_headers_hash_bucket_size 128;
    }
}