If you manage to keep directional control there shouldn't be much of a problem. Remember, the Airbus will maintain the last pitch command you gave it. For example if you leave it at 10*, it wil fly that until it runs out of fuel. So after reaching the initial 10*-12.5* your pitch inputs should be very slight only to follow the SRS commands, which is V2+10kts. Also, another common mistake I see with my students: As soon as you have 12.5* and have the beta target centered, USE YOUR RUDDER TRIM. And don't forget to ease off the pedal as you put in more Rudder trim. Count to 12 (Mississippi wise), center the FD's and hit that AP button. All this happens pretty much simultaneously. Too bad your instructor is so impatient. Any more questions don't hesitate to ask!