so just like what others have said, you need to balance your kegging system if you don't want to be constantly hcanging the pressures. i believe 3/16'' ID beverage grade tubing has about a 2 psi drop per foot. just for reference, i have my system set at 10psi at 40 degrees with 5 feet of tubing, and my beers comes out as i would want, some beers are a bit more finicky than others.
with 1/4'' ID hose, you would need maybe 15 feet of line in order to have the proper drop in pressure?
what's happening is that there is too much pressure at your faucet, either picnic tap or a metal faucet, and this is causing the co2 to come out of solution violently, creating the big head and also making the beer flat in the process.
once you have your system balanced, you will get the 'right' amount of head (read: as much as you want) and still be carbonated.
be careful with the high psi to carbonate and then reduce to serve. it is very innacurate and will cause you problems, especially since this is your first time. i would say to follow what others have said, just set it at your serving pressure/temperature, and come back in a week or so and then draw your first 'real' pint.
now since you've already overcarbed most likely, this will be a bit difficult though. you need to bleed off the excess pressure repeatedly in order to keep the beer from continuing to be overcarbed. in the future you can invest in a bleeder valve with gauge to see the internal pressure in the keg.
once you have more experience with kegging, you can do the overpressure to carbonate if you know how long it will take at a certain temperature to get the right number of volumes of co2 in the beer.
hope this helps!