>>912753 Wading against the stream of course so you wouldnt scare them. Try to move as quietly as possible for trout! Look your local water relater bug hatching times. They feed on what they can find so its always best to look around and under rocks to find out what they feeding on at that time. Very approx i can say that dry flies in hot/warm weather and nymphs all year around. Same goes for spin fishing with topwater lures - when water is cold they get inactive and stay near the bottom because there the water is few degrees warmer.
For trout they are not bottom feeders like carp or tench so trying to get them on same tactic is unlikely.
Try agressive colours... For me the best works orange and red - makes them horny af.
They love hiding in small pools, behind rocks and trees - thats where they feel the safest thua have the best chance making them take your fly.
Pic related on of my favourite trout flies - first time got my hands on it when my relative brought a cheap pack with them from canada, they cought many fish but quality was shit... European here