Mesuxelf

Hey, I got a 2007 saab 9-3 2.0t with 83k miles on it in January, and I love the thing. I'm into cars but not that knowledgeable and wanted to mod the car, but I don't know where to start. I wanted to put a cold air intake on it to give it a tiny hp boost while also making the turbo louder, but I'm worried that if I give it more hp without a tune it'd be worse for the car. How would I go about getting a stage 0 tune? Just take it to a tune shop and they'd do it there and I'd be all set? How much would this affect reliability? Sorry if these are car noob questions I'm just looking to make sure I don't permanently screw up my car. Thanks in advance!