Yeah you probably want to go with an indica strain or a hybrid that is indica heavy. Indica's are more of a body high where as a sativa is more of a head high. Because of this, Sativa's can bring out some anxiety. I would also just try smoking the flower first. Concentrates can be intense and with edibles its hard to control the dose
Marijuana affects different people differently. Usually Indicas have a more calming effect than Sativas. But as far as stress relief you should realize one of the most common adverse side affects of Marijuana is paranoia and anxiety...
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