Well - pitch&power is everything!
250kts - 3° Pitch 63% N1 is the initial setup
Then start your roll, when passing 30° bank, increase power by 5% to 68% and use the pitch-up moment of power increase to reach 4.5° pitch attitude.
Check that you have 0 vertical speed at that configuration (dont know the targets of your simulator, so you might need to change those values a little bit). When you found the pitch for 0 vertical speed:
NAIL IT THERE! That is the most important part. Pitch stays, correct airspeed with SMALL power changes so you have no influence on pitch.
On rollout passing 30° bank reduce power to 63%, nose will drop back to 3° pitch and you are fine.
To sum up:
1. Stabilize at 250
2. Roll in, passing 30° increase power by 5%, pitch according to 0 V/S
3. KEEP YOUR PITCH, CONTROL SPEED WITH POWER, DON'T TRIM
4. On roll-out passing 30° reduce power back to initial value for straight and level flight at 250, nose will drop by itself with power reduction
Best wishes for your training