If you would like to access your web server that you have at home from other places and do so securely, I would look into a company called tailscale.com.
They have a free tier that I use that gives you as many devices as you have up to 100 and up to three user accounts which is two more than you'll need.
With a free login you install the software on your server and on your phone and any other computers you have and it will create a private tail scale network that they call a tail net and all of your computers will be assigned a private IP address accessible only by other computers logged into your account.
This is how I access my network attached storage server from away from home.
You should be able to do the same.