Okay. So here's the situation(and I'm sure this has probably been answered, but I don't know where.)
I am building a RasPi3B+ for my ten year-old son as a learning/coding desktop and as a retro gaming console.
I have very limited knowledge of Linux, and I do not have a Linux distro to add my own OSes to the aforementioned bootloaders. So the Github option is not a valid option for me.
I downloaded the latest and most up-to-date versions of Raspbian and RetroPie. I want to use these versions and no other.
I have already installed Raspbian on a 256GB SD card(It boots, it works.) and RetroPie on a 128GB SD card(also boots, also works.)
I want these cards connected to the Pi at all times, but want a bootloader to give me an option of which of these to boot to.
I'm using Windows 10 as my main system(again, no Linux option and little knowledge of it anyways. Yet.)
What are my options here, realistically?
Thanks for any help you can offer.