Why not do it like the big boys/girls and put the power on, pitch it to a climb attitude, retract flaps from max drag to a setting which will ensure the warning horn won't blow, then retract the gear. Complete remainder of flap clean-up at safe altitude and speed. Whether one should wait for a positive rate of climb before retracting the gear depends on whether the aeroplane has the kind of performance to climb with gear still dangling, but you at least need to be sure you are not going to impact the ground before retracting gear as it does a lot to absorb crash forces.. .Retracting gear before getting rid of the landing flap will result in a most distracting warning horn on many types. Also, once you learn to do it one way, hopefully you will always be able to repeat it, whereas having different sequences for slightly different scenarios may cause confusion.. .If the flaps are at an intermediate setting, retracting them one stage before retracting the gear maintains the K.I.S.S. and won't do any harm if your speed is near where it should be.