Your question is really "how do I use" rather than development of OBS software, so probably should be in a help forum. And for reasons that elude me, the most active discussions about OBS happen on Discord. So you might try posting details about what you are trying to do there.
BUT as long as we are here:
By "clone" I presume you mean two images of yourself acting independently - not just two camera angles taken at the same time. Is that correct?
OBS is mostly intended for live use: capturing someone playing a video game, a church service, a concert, a sporting event. It lets you switch between cameras, create scenes with cameras or other images inset, etc. But the OBS operator is usually making decisions about which scenes to show in real time, as the event occurs.
"Video creation" that doesn't have that real time constraint is often easier to do in a video editing tool such as Shotcut (to name the free one that I use). You can do even fancier effects and layouts than OBS allows, and you can take as much time as you want to tweak them.
You COULD record yourself doing something, use OBS to combine that video with a live camera, and then stream or record that. But unless you have someone else to run OBS while you perform, edited video seems easier.
