Sure! First you just need to create a new camera as a child of the main camera. Then create a material with this new camera as the render texture. After that create a raw image in the UI and attach the material to it. You'll now have a smaller map that follows you around. If you want the map only to show specific things then go to the new camera and change what layers the camera can see. If you want specific icons for different characters/ items then create a child for that object and add a sprite renderer with the map icon. If you put this icon on a new layer called "Map Layer" (although you could also call it anything else if you want) and then disable the map layer on the main camera, you will only be able to see the icons on the minimap. If you want to make the map show a larger area then just change the size of the new camera. :)