Opening and cleaning a MacBook Pro (retina 2012)
Assuming the warranty is expired, you'll be fine. If you want to just remove the dust from the inside, you're on the right track. Get a can of air, a vacuum, and a pentalobe driver set. 

Don't actually vacuum the inside though - turn it on and hold the nozzle up to the outlet of the area you're blowing the dust from. Static won't be a problem as long as you don't touch the computer with the nozzle.