try strawberry cough. its not an indica (its sativa) but it is pretty mild in effect. granted if you smoke too much of anything it can make you paranoid so moderation is the key especially when you first start smoking a new strain. ive made the mistake of loaded a fully packed bowl of a new strain...smoking it...only to find it was extremely potent (more than i was expecting).
i grew a strawberry cough from dutch passion and its pretty low key on anxiety, paranoia, depression and things like that. my only regret is not flowering it a week or so longer. some were harvested with mostly milky trichs. if i would have waited for a few more amber trichs it would be even more mellow.
give it a shot.
jillybean is another strain (TGA) known for giggles and good moods. i havent tried it (i want to) but hear only good things about it in terms of leaving one in a good state of mind.