To help you out on this point. Once you have the Pi OS on the SD card, you no longer need to remove the SD card unless you are going to install a prebuilt image that has both the OS with WC installed on it already. Think of it this way, the Pi is a computer. “Buster” or “Bullseye” is the OS (aka the “windows”) for the Pi. WebControl is an app/program that needs to be installed (like Office, or Google Chrome, or a PC game). So, since you stated above you have already loaded the OS in the Pi imager (with the wifi and other configurations taken care of), then what you need to do is plug a keyboard, mouse, and monitor into it and turn it on. I think you said you loaded a full version that has a desktop GUI (Graphic User Interface) that will look a lot like what you would see in a Windows Machine. from there, you can test internet connectivity with the Pi by opening up it’s internet browser and going to any website you want to go to. If that works, then you have internet connection.
As you are getting used to the Pi, search Youtube for how to use the RPi like a regular computer. I haven’t searched that myself, but I would bet there are plenty of videos on how to just navigate around and the general use of the Pi. From there, look to how to run commands from a terminal window. This will be needed to get WebControl installed and then set up as a Web Service as @jonatpridesleap mentioned. You can find those instructions here: WebControl Setup on Raspberry Pi
You can read through the beginning portion of it, but you have done most of that already, so you’ll want to pick up about a third of the way down here:
That should get you moving in the right direction to get it up and going.
edit: If you want to start over from scratch and go the pre-built route, another way to do that is to follow this post here: How Do I Install? Raspberry Pi and WebControl setup for complete beginners