I start my seeds in soil (the easiest and safest way), after good growth is going, go to flower mode and watch very carefully. All males are destroyed immediately and revert the rest to veg. A couple of the best females are kept in soil as mothers. I take cuttings from mothers and grow these so I can be sure I don't waste time growing males.

Hydro will grow faster and yield more than soil, and I think it's much easier and safer in the long run.