I know yours is a Honda, but I did my "91 Camry 4 cylinder valve adjustment after literally no one I could find knew how to do it. A dealership 30 miles away possibly knew of an older guy that "might" be able to do it, but after much hassle I decided to try it myself. Not long before I burnt a valve because I never adjusted it in 250,000 miles, the engine ran incredibly quiet. And then it started missing on one cylinder about a month later. Burnt exhaust valve.
I read up on it and it just took time but wasn't really that hard. If you can read decimal points on feeler gauges and add or subtract to get into the right tolerances, you should be good. I adjusted them a bit on the looser side of the scale so that I would probably not ever have to do them again. 60,000 miles later, the car is still running strong and I saved about $600 that the dealership "older guy" would have charged.
My engine is non-interference so no real damage if I really messed up. I bought 3 new shims at the dealer for about $60 or so. Took me about 3 hrs and triple checked them a couple days later. I'm not sure about Honda engines, but it made me feel better saying that I did it myself. Read up on it and watch some videos to get familiar with what might be ahead. The dealer/independent shop will always be there if you don't want to attempt it. Good luck either way.