The comment about practice is gold.
After a while you will get the hang of it and develop your own technique.
I start out with a widefield map of the area of interest and a low power eyepiece, then I familiarise myself with star patterns within that area... mostly I look for things like stars forming 'v' shapes, circles and lines, arcs etc.... rotating the map until it matches the orientation I see in the scope.
With this done I can get the scope roughly centered on the area where the object of interest(galaxy, neb etc) should be, and then move to a narrowfield map and higher power eyepiece and do it over again... star patterns, etc.
After a short while the object will suddenly jump into your view(if it's bright enough), and you'll wonder why it seemed so hard to find before.
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