Make a django website to redirect and keep the domain name in the address bar instead of the VPS IP.

I have a django website hosted on an VPS, and a domain that i have bought from somewhere else. I want a stealth redirect, i want to create any subdomains, example : subdomain.MYSITE.COM that will go to the IP address of the VPS/anything for example : a subdomain for http://IP and one for http://IP/2/ and one for http://IP/3/ and also to keep the subdomain.MYSITE.COM name in the user address bar, to dont change to the IP address of the VPS in the address bar. I think that it s also needed to install a SSL certificate for the IP VPS in order to work ? I will want one as well to be installed ( i will purchase it separately ). I have configured nginx to allow all hosts. Also you can move the domain nameservers to any other provider who have stealth redirect in the one that i have it it s not familiar for you. I also want to tell me how can i create subdomains and stealth redirect them to http://IP/XXX/ . Thank you. I pay 40 euro for this .