If you’re using Linux or Mac OS setting up a C++ compiler is very easy. Pretty much all Linux distros have both GCC and Clang on their repositories for you to install with a simple command. On Mac OS you can type “clang” in a terminal and it will prompt you to install development tools, which will include the Clang compiler and some other tools.
Windows kind of sucks for development, but it is possible with a bit more difficulty. GCC and Clang tend to be kind of hard to set up - I have used Msys in the past and it has worked alright. Microsoft’s development tools are fine as long as you don’t care about using Microsoft’s shitware (I’m assuming you don’t if you’re using Windows xD). MSVC is their compiler and it tends to be pretty good for most purposes, all things considered. It’s faster than GCC in my experience, but the optimiser is a bit worse sometimes so it can produce slower code - not really anything you need to worry about though given you’re probably not going to be making programs complex enough where such minor differences will matter. You can install MSVC with Visual Studio which is a giant, hard to use, complex IDE that is full of bugs and hangs all the time. You can use it if you want to but you can also just compile from the command line with the cl command once it’s installed.