Feeding: good quality pellets/flakes (I use omega one) 5 days a week, bloodworms 1 day a week, fasting 1 day a week
Lighting: lighting in unplanted tanks isn't super important, you just want to give your fish a day/night cycle. If they are in a room that is pretty dark, like a bedroom, you probably should give them around 10-12 hours of light a day. Ex: on at 6 AM, off at 6 PM. If the tank is in a well lit room, like a living room, then just turn the tank light on when you turn the room light off. Don't leave the tank light on at night.
This is what I use for my betta and it works well.