I just got a Unived 8mm movie camera as a gift and I love it! I just have no idea how to use it. I know how to wind it and press the button and how to open the back to put in more film but other than that I've got nothing. I have no idea if it's still useable, what specific type of 8mm film it requires, how to reset it, what "unexposed feet" means and how to adjust the light aperture over the lens. I also very much apologize for my limited cinematic vocabulary that may be causing some to cringe . I would love to actually learn how to properly use this if possible and any help would be greatly appreciated!!!! Thank you so much!