I've had great success with marijuana. I find that it helps my digestion, mood, helps me relax at night and fall asleep.
If you plan on smoking, I'd recommend a water pipe to help filter out crap from the smoke.
If you have an option Indica is more relaxing; sativa is more mental activating for me.
With edibles, if you've not been using cannabis before, start with 5mg and wait a few hours. Some people will take 5mg and go take a nap, others will take 5mg and feel nothing.
DO NOT EAT THE ENTIRE 100mg candybar. . .you want to start small and slow until you find what your tolerance level.