People are asking me more and more about portraits. Since I'm a newbie concerning artificial lighting, I feel I have to learn more about that, a lot more, before being able to make an artificially lit portrait with confidence.
All the lighting equipment I've got right now are two umbrellas and an SB-800. OM-D E-M5 II can command the nikon flash to fire through IR. Where should I look for tips and tutorials to become better at it?