Adding any highflow intake to the already lean state of the stock tune would likely cause your engine to knok/ping/detonate etc
Probably the easiest Stage1 tune is purchasing a Cobb AP/tuner and flashing the ecu with an off-the-shelf stage1 tune.
If you want an intake, Cobb offers tunes for either their own branded SF intake (get the box/enclosure) and the aem cai
I recommend visiting a reputable shop if you are not comfortable following the manual exactly or never flashed any ecus before. Just observe and you will realize it's pretty simple to tune using tbe AP and the OTS tune
Also, the Cobb AP/tuner can be used to reflash either back to stock or upgrading to stage2 (catted down pipe) as needed or until you are ready to run a custom tune later on