PLEASE read your owner's manual AT LEAST ONCE, and whille you're at it PLEASE familiarize yourself with the BASIC CONCEPTS of audio technology.
It's like you just ran out and bought yourself a Fighter Jet, and now you wanna know "How do I fly it to New York?", and "Where's the thing that makes it go?" ... without ever having learned to fly an airplane in the first place.
Most people put on their pants before they put on their shoes, learn to crawl before they run a marathon ... dig?
And that's kinda where you are with this stuff.
So jeeez, man ... not trying to be mean or anything ... but you can't expect people to spoon-feed you everything if you aren't putting out the effort needed to understand basic stuff to begin with.
Case-in-point: A Microphone is a mono sound source. You plugged it into a mono input, right? You sampled in mono. Where does any of that magically turn into stereo?
Now see, you might just mean you want that mono sample to "come out of both speakers", which really isn't the same thing as stereo at all, it's just a mono signal panned to center.
Maybe you didin't realize that if you want to record a stereo sample, you need to sample both left and right channels at the same time ... which would take either 2 microphones or a stereo microphone with 2 outputs.
Maybe you want to take a mono sample and "stereo-ize" it by using a stereo chorus or delay or any one of a dozen or so other techniques.
But nobody can really give you a straight answer, because you aren't asking a sensible, straight question in the first place.
I know how it is, my friend. I'm NOT putting you down. You've got all this passion and drive (and maybe even a bit of talent if you're lucky!) and you bought yourself a prime piece of production gear ... you just want it to "work" somehow.
But you need to direct some of that passion and energy towards learning the BASICS of your craft if you ever want to get beyond the "this shit's confusing the hell outta me, bangin' my head against the wall" stage.