I can help you with that; here's a list of NES emulators I found: https://www.digitaltrends.com/gaming/best-nes-emulators-pc-android/
MAME is meant for emulating arcade systems, which is why you couldn't get it to work before. Feel free to ask more questions, as there's multiple people here that know how this works.
MAME is meant for emulating arcade systems, which is why you couldn't get it to work before. Feel free to ask more questions, as there's multiple people here that know how this works.