Hey buddy, with so many strains out there its difficult - can I suggest you browse a website like
http://cannacentral.com/ to discover all kinds of strains that are widely available & how they generally affect the users. Once you like the sound of a few you can dig deeper from there. The strain of course is what really determines the different effects...but bear in mind the timing you choose to harvest affects the THC & CBN levels which has something to with anxiety as well as curing the buds for a minimum period. Maybe someone can confirm this because im no expert & planning my own first grow

good luck