For me, the MOST IMPORTANT thing I did for my dark spots was to religiously use sunscreen. The sun can make those spots darker and last longer, so that's step no. 1 for you. Specially if you'll be using fading/lightening/exfoliating products, as they make your skin even more sensitive to darkening in the sun.
Don't aggressively treat it, be gentle and patient, invest in a good concealer that can cover the spot up as you heal it.