The THC content is likely to be as good or possibly better than the stuff you pick up on the street. The main drawback of autoflowering dwarfs is they're not suited to cloning and the yield doesn't compare to non-autoflowering strains. For your first grow it probably makes sense to just use bag seed. Growing is a learning curve and you will make a lot of mistakes. Don't splash out on genetics and instead, save your money for some decent lights and ventilation. Happy growing!