ahh the old pedal nudge
you will get used to it to the point it becomes second nature.
Riding fixed the early lessons
1/ don't stop pedalling.
2/ Fartletts, or the art of farting whilst pedalling, little lifts off the saddle whilst pedalling.
3/ road bumps and bunny hops, as above but pull on the bars and pedals as well.
4/ descending, learn to relax the hips and let them legs go, keep a firm but not tight grip on the bars.
5/ Starting off, pedal position, just apply the front brake and pull up on the pedal while lifting the weight off the rear wheel, or stop when the pedal is where you want it.
6/ don't stop pedalling