If you have a laptop, please understand that switchable graphics (i.e. Nvidia Optimus) are not well supported. In this case you will have an integrated Intel GPU working along side a more powerful Nvidia or AMD card. Unfortunately, this can be problematic and not recommended. In fact, laptop computers are not recommended at all due to lack of power and various compatibility issues. For the best experience, please use a desktop machine with a dedicated Nvidia or AMD GPU. It's hard to give an exact minimum supported spec, but please try to get a powerful, modern graphics card.
Direct mode has the ability to mirror to a window on the monitor.