How can I make more natural lights inside and out?

Great question, Francisco. For interior lighting, use 'Interior' mode Lighting Preset (on the Project, Lighting tab). This is optimized for those inside shots. For exterior lighting, the HDRI Editor (on the Project, Environment tab) is going to come in handy. Along with being able to set custom light pins, and adjust the HDRI to your liking, you can also utilize the 'Sun & Sky' for realistic time/location lighting. I hope this helps!