I've only fished chironomids one time, it was at Lone Lake about 8 years ago. It was really easy to learn and I landed at least 20 rainbows that day. Trouble was I found it to be supremely boring. I took off the bobber and used a slow retrieve to make it more challenging. My friend had beer in the boat and when offered I said "I never drink while fishing". By the end of the day I drank 6 beers

. It was great fishing with my friend, but I retired from chironomid fishing after that day.
Anyway, one suggestion is to pay attention to the structure of weed beds and anchor near a hotspot of chironomid activity. The trout will cruise back and forth at such locations sucking up chironomids. Bobber down!