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Likely using the wrong nomenclature, I mean where you stick a feeler gauge in between the taps on the cylinder head. I've picked up everything from YouTube basically. It was do it myself or pay Honda ever increasingly extortionate servicing prices and often finding out it hadn't been done properly anyway.

The telescopic magnet and kitchen paper towel are your friend.....😀

I don't automatically change brake fluid every two years. I measure the moisture content and use that as a guide. But I don't commute, nor do I ride in adverse weather unless on a trip, so my brake fluid always looks like new at two years. I use the five-year coolant too, when I first change it. I favour not disturbing things at the specified intervals if there is no real need. That said, at the OP's mileage I'd do both. +1 on replacing the oil (but not filter) again after a few hundred miles. Best get rid of the rest of the chocolate pudding.....

May be worth changing again in 1-2k miles as way of a flush.

As long as it doesn't look like an alien blob you'll be fine.

Coolant tomorrow with valve timing, spark plugs and air box.

Don't worry about it. More importantly, has the brake fluid been changed and is the coolant due? Both on 2 year intervals rather than miles and both can ruin your day. Andy