It is ALWAYS preferable to go around if you do not have a stabilized approach, rudder or no rudder. I think we all as pilots may get into the habit of trying to "make" the landing happen regardless of the quality of the approach. Pilots with lots of practice with a particular airplane may be better at it than others, but all will eventually get bitten by getting the mind set that the approach WILL culminate in a landing.

New pilots probably do have their hands full for a while just concentrating on aileron, elevator and throttle control. One great use of the rudder is to help lose a little altitude on final. This is done by giving the aircraft some aileron into the wind, but giving it opposite rudder. It effectively kicks the fuselage out of a streamlined position and adds more drag, causing a loss of airspeed. The airplane will begin to descend more quickly for a given throttle/elevator trim setting. Doing this takes practice much like anything else, though. Let us know how things go for you in your practice!